CircleCount helps you better understand Google+

2013-05-22 22:49:08 (1 comments, 3 reshares, 15 +1s)

And while this is a sci-fi flick, the makers of “Europa Report” say they have steeped it in real science. JPL scientists acted as advisers on the film, and it’s been called “One of the most thrilling and realistic depictions of deep-space exploration since ‘Moon’ and ’2001: A Space Odyssey’” by Space.com.

2013-05-22 21:23:14 (0 comments, 4 reshares, 5 +1s)

Ask Watson. The +IBM Jeopardy!-winning technology is being made available for new business and customer applications. Here's a brief overview of how Watson answers complicated questions (and even knows when it's not quite sure enough to respond.) 

http://bits.blogs.nytimes.com/2013/05/21/i-b-m-puts-watson-to-work-in-business

How Watson helps doctors treat cancer: IBM Watson Demo: Oncology Diagnosis and Treatment (2 min.).

#cognitivesystems #computationalscience #computerscience #scienceeveryday

2013-05-22 19:32:07 (0 comments, 0 reshares, 1 +1s)

Super Science Circle - May 2013 Edition

Need more science in your Google+? Well, here's all the science you can handle! Enjoy my latest, heavily curated edition of the Super Science Circle.

Please share this circle... for Science!

For the uninitiated, I maintain a circle of 450+ people who are active on Google+ and regularly post on Google+. In this circle you'll find scientists, journalists, astronauts, educators, and science enthusiasts. By importing this circle into your own circles, you'll immediately gain a vibrant and fascinating feed of amazing science stories.

I recognize that it might be too much science, so I suggest you create a brand new temporary circle and evaluate the people in the circle. Only transfer the keepers to your permanent circles. Then, when I update the circle next month, rinse and repeat.

Are... more »

2013-05-18 14:27:20 (6 comments, 10 reshares, 36 +1s)

A comment on the image from reddit:

"I've been in one of these. They're called Anechoic Chambers, and they're trippy as fuck.
I went in with a few colleagues as we had to measure the unaffected natural noise of a few things. These rooms completely remove any environmental affect on noise, so you can do some great tests.

The first thing you notice when the door is closed is that, immediately, you feel like you're falling. Your ears can't hear the reflections of noise from the floor, so your brain thinks that there is no floor, so you just feel like you're falling whilst stood up.

You suddenly notice that you can hear every breath that you take in crisp, clear clarity. Every heartbeat causes the sound of a rush of water in your ears, and the person stood just one foot to your side who was talking? Yeah, they're still talking, but now they... more »

2013-05-17 20:34:49 (1 comments, 0 reshares, 4 +1s)

My review of NOVA's very cool "Earth From Space" presentation -- and a chance to win a free copy! http://lightsinthedark.wordpress.com/2013/05/17/win-a-dvd-of-novas-excellent-earth-from-space/

2013-05-17 16:06:51 (0 comments, 2 reshares, 17 +1s)

There it is! On the 24th of May 2013 the eLISA consortium will submit their science theme to the European Space Agency.

In "The Gravitational Universe" they describe how a mission to detect gravitational waves in space will allow us to revolutionize astronomy, and you are invited to be part of it.

Join the science theme and this ground breaking mission at www.support.elisascience.org – let us make history together.


The Gravitational Universe (abstract from www.elisascience.org)

Gravity is the dominant force in the universe. We propose the first ever mission to survey the entire universe directly with gravitational waves, to tell us about the formation of structure and galaxies, stellar evolution, the early universe, and the structure and nature of spacetime itself. Most importantly, there will be enormous potential ford... more »

2013-05-17 11:49:57 (0 comments, 2 reshares, 9 +1s)

Waking up, to a happy day ahead with a smile. 17-May-2013 :) :)  :)

Our small friends are happy to start their adventure. :)
A lovely bunch. :)
You're up and ready for today's adventure ? ;)

Hoping to have your happy smile, for them and also for the new day running over there. :) :) :)

Image via http://goo.gl/mIQ2w

2013-05-16 17:42:22 (0 comments, 0 reshares, 6 +1s)

NASA, Google, university researchers, and others will get to work on a super-fast D-Wave Two computer that is said to exploit quantum effects.  

A classic hard problem is that of the travelling sales rep, who needs to visit several cities in one day, and wants to know the shortest path that connects them all in order to minimize their mileage.

The D-Wave Two chip can compare all the possible itineraries at once, rather than having to work through each in turn. 

#ComputationalScience   #ComputerScience   #ScienceFunday

http://www.bbc.co.uk/news/science-environment-22554494
http://www.bbc.com/future/story/20130516-big-bets-on-quantum-computers
http://arxiv.org/abs/1304.4595
Benchmarking paper: http://www.cs.amherst.edu/ccm/cf14-mcgeoch.pdf

2013-05-09 16:32:52 (1 comments, 4 reshares, 6 +1s)

Quantum computer wins first head-to-head speed test against conventional computing

A computer science professor at Amherst College who recently devised and conducted experiments to test the speed of a quantum computing system against conventional computing methods will soon be presenting a paper with her verdict: quantum computing is, “in some cases, really, really fast.”

“Ours is the first paper to my knowledge that compares the quantum approach to conventional methods using the same set of problems,”

“There are degrees of what it can do. If you want it to solve the exact problem it’s built to solve, at the problem sizes I tested, it’s thousands of times faster than anything I’m aware of. If you want it to solve more general problems of that size, I would say it competes – it does as well as some of the best things I’ve looked at. At this pointit’s merely above a... more »

2013-04-29 19:20:21 (7 comments, 0 reshares, 9 +1s)

An article I wrote in which I attempt to catalogue various approaches to the technological unemployment problem.

Here's the outline version:

(1) There is no problem; technological unemployment is a myth
(2) Unconditional basic income
(3) Opt out of capitalism and take advantage of decentralized technologies
(4) Resource based economy (or automation socialism?)
(5) Wealth redistribution according to an incentive system
(6) Work together with the machines
(7) Small scale policy adjustments designed to encourage education and foster innovation
(8) Get through this transitional period as fast as possible
(9) Optimistic libertarian
(10) Issues like technological unemployment are dwarfed by existential risk

2013-04-26 21:31:05 (0 comments, 1 reshares, 4 +1s)

Super Science Circle - April 2013 Edition

It's time for another sharing of my Super Science Circle. This is a collection of 400+ active people on Google+ who often post about science. If anyone tells you G+ is a ghost town (not that anyone does any more), get them to import this circle. 

PLEASE SHARE THIS CIRCLE... FOR SCIENCE!

I have personally reviewed each and every person on this list, to make sure that they:

1. Are active and engaged on Google+
2. Regularly post science-related stories on Google+

In this list you'll find scientists, journalists, researchers, professors, astronauts and general science enthusiasts. 

Not everyone in this list is going to be to your personal liking. So what you'll want to do is import the list into a temporary circle. Then move people over one by one into more permanentl... more »

2013-04-24 14:09:43 (0 comments, 6 reshares, 20 +1s)

Play with path-finding heuristics & algorithms. Lots of fun, & educational too.
http://qiao.github.io/PathFinding.js/visual/
Via +Andrew Pam & +Jackie Ng 

2013-04-24 04:19:46 (3 comments, 5 reshares, 18 +1s)

Beautiful violin from Thao Nguyen Xanh.

2013-04-22 01:07:10 (3 comments, 6 reshares, 13 +1s)

Educate girls - around the world, for the good of the world.   

"Investment in girls' education may well be the highest-return investment available in the developing world."
- Larry Summers, chief economist, World Bank

Girl Rising tells the stories of 9 extraordinary girls from 9 countries, written by 9 celebrated writers and narrated by 9 renowned actresses. Girl Rising showcases the strength of the human spirit and the power of education to change the world. www.girlrising.com/see-the-film/
www.10x10act.org & www.GirlRising.com

In celebration of #ScienceSunday  :)  

2013-04-13 21:56:16 (0 comments, 0 reshares, 5 +1s)

Over 80,000 data scientists from all over the world have now participated in Kaggle‘s data competitions – games where scientists compete for cash prizes to solve business problems for major companies. Kaggle competitions have helped improve premium pricing for Allstate, improve hospital pricing for GE, find talent for Facebook, and map the universe’s dark matter for NASA. They’re able to do this because these companies have well-defined problems that are well-suited for this type of problem.

However, many companies have problems. And they have lots of data about those problems. But they have no idea how to use that data to even ask the right question. That’s where Kaggle’s new service, Kaggle Connect, comes in.

2013-04-13 20:37:16 (3 comments, 1 reshares, 16 +1s)

This is pretty incredible.

2013-04-12 17:08:27 (15 comments, 2 reshares, 13 +1s)

Hear the scream of a star as it falls into a black hole.
For real. The disturbances in space-time caused by an event like that can be converted into audio waves. Hear for yourself:

www.blackholehunter.org   (use a headphone)

Of cause this distant scream is faint compared to all the noise. So it could be challenging to hunt down the signal. How good is hour hearing? How good does your brain distinguish between signal and noise? The Black Hole Hunter not only tests your abilities as a gravitational wave detector, it also gives you interesting background information of the signals your should hear. Have fun and enjoy your weekend. :)

Image: Artist Dana Berry depicts a binary system akin to Cygnus X-1. It consists of a blue supergiant star (right) and a black hole. The black hole is surrounded by a gaseous accretion disk that is fed by the star. Some black... more »

2013-04-12 16:28:58 (2 comments, 2 reshares, 10 +1s)

This is not how HTML and CSS should be used!

// Some fun coding by Peter Westendorp: "Tunnel vision 3D" with CSS. As Peter writes: "This is an experiment to demonstrate the power of CSS and modern browsers. This is not how HTML and CSS should be used." :D

See it live here http://bit.ly/10SvqbK

2013-04-12 12:01:08 (0 comments, 6 reshares, 14 +1s)

Find a Higgs boson in LHC public data: http://home.web.cern.ch/students-educators/updates/2013/04/find-higgs-boson-lhc-public-data

This image shows muons (red lines) flying out from a collision in an event display from the CMS detector © CERN for the benefit of the CMS collaboration - for terms of use see http://cern.ch/copyright

2013-04-12 11:08:14 (0 comments, 1 reshares, 8 +1s)

The beginning of the universe, for beginners.  First +CERN +TED-Ed video unveiled :)
More animated lessons on ed.ted.com starting May 3rd. See +TEDxCERN https://plus.google.com/u/0/107780808261713407966/posts/4B9Ea8zEz2g.
#Physics   #Cosmology   #ScienceFunday   #ScienceEveryday  

2013-04-08 01:03:01 (1 comments, 3 reshares, 12 +1s)

Grand Vision, Epic Quest. Back in the 1960's, we set our sights on an unprecedented exploration. We began to put people on the moon and imagined visiting our nearby planets. 35 years ago, we launched a pair of early scouts, the Voyager spacecraft, now approaching the edge of the solar system and about to embark on a journey through interstellar space.  

Each carries a Golden Record, greeting those who may one day intercept it with laughter and songs from Earth.  

Lots of amazing NASA footage in this new SpaceRip video.
+ScienceSunday | #ScienceSunday | #ScienceFunday voyager.jpl.nasa.gov

"Of the 200 billion stars in the Milky Way galaxy, some — perhaps many — may have inhabited planets and space faring civilizations. If one such civilization intercepts Voyager and can understand these recorded contents, here is our message: We are trying tosurvive o... more »

2013-04-05 13:59:26 (2 comments, 1 reshares, 9 +1s)

"What I believe is that all clear-minded people should remain two things though out their lifetimes: curious and teachable." --Roger Ebert

2013-04-03 12:58:55 (1 comments, 1 reshares, 10 +1s)

2013-03-21 21:24:02 (2 comments, 3 reshares, 16 +1s)

Planck reveals an almost perfect Universe

2013-03-21 16:32:20 (6 comments, 7 reshares, 16 +1s)

Water matters. Solvable water and sanitation issues take the lives of  thousands of children every day. Tomorrow is World Water day - learn more at www.water.org.  

Co-founded by Matt Damon and Gary White, +Water.org  is a nonprofit organization that has transformed hundreds of communities in Africa, South Asia, and Central America by providing access to safe water and sanitation.

"The lack of access to Clean Water and sanitation kills Children at a rate equivalent of a jumbo jet crashing every four hours."  
- +Ali Adelstein at  https://plus.google.com/u/0/117520666412794415990/posts/UzevVfcfNYD  Thanks for the reminder!  #WorldWaterDay   #worldwaterday2013

World Water Day Google+ Hangout Celebration:
https://plus.google.com/u/0/events/cm03qvkf4v88te24seeo02hq5ac

2013-03-21 01:19:39 (5 comments, 4 reshares, 18 +1s)

Mapping a Living Brain, Neuron by Neuron

It looks like an oddly shaped campfire, but it is activity of individual neurons across a larval fish brain. It is the first time that researchers have been able to image an entire vertebrate brain at the level of single cells.

Brain function relies on communication between large populations of neurons across multiple brain areas, a full understanding of which would require knowledge of the time-varying activity of all neurons in the central nervous system. Here we use light-sheet microscopy to record activity, reported through the genetically encoded calcium indicator GCaMP5G, from the entire volume of the brain of the larval zebrafish in vivo at 0.8 Hz, capturing more than 80% of all neurons at single-cell resolution. Demonstrating how this technique can be used to reveal functionally defined circuits across the brain, we identify... more »

2013-03-20 14:04:50 (3 comments, 4 reshares, 16 +1s)

Billions and Billions

As of this writing there are 861 confirmed extra-solar planets.  These are planets for which we not only know they exist, but we know some things about them, such as their orbit, mass, etc.  The Kepler mission, a space telescope surveying nearly 150,000 main sequence stars, has found nearly 20,000 possible planets.  Of these, we have found more than 2,700 candidate planets.  These are planets for which we know some of their properties, but which haven't completed the rigorous process of being officially confirmed. This is a huge change from just twenty years ago, when there were no confirmed main-sequence exoplanets.  

With nearly 3,000 candidate planets we can now do a bit of statistics on just how common planets are, their typical masses, and the type of stars they orbit.  You can see some of these statistics in the figures below.  The firstimage ... more »

2013-03-20 13:43:02 (2 comments, 0 reshares, 6 +1s)

If you're looking for some pre-made circles and cool people to follow, check this out: http://goo.gl/LCuoU

There is a TNW article about it here: http://goo.gl/QFk1H

2013-03-20 13:36:08 (0 comments, 1 reshares, 3 +1s)

The Return of the Super Science Circle

Okay, I'll admit, I made a mistake in retiring the Super Science Circle. I wasn't wrong; Communities are still the future and the best way to make friends here on Google+. But I realized that the Super Science Circle is simple and efficient way to get new people to see that Google+ isn't a ghost town.

PLEASE SHARE THIS POST... FOR SCIENCE!

When I was attending +ScienceOnline 2013, I must have helped dozens of people join Google+, and the first thing I had them do was import this circle. It's an invaluable tool for getting new people up to speed.

So, I just did a complete refresh on the circle. I examined every single member and judged them according to my two-part criteria:

1. Active in the last 30 days or so.
2. Regularly post on scientific topics.

If you know anyone... more »

2013-03-06 02:07:50 (9 comments, 2 reshares, 8 +1s)

I am so doing this with my millions!

2013-03-03 19:00:50 (1 comments, 2 reshares, 7 +1s)

Nice program about neutrinos!

2013-02-26 20:03:03 (17 comments, 2 reshares, 11 +1s)

Coding superpowers - offer the ability for students to make a living - and change the world. "Every student in every school should have the opportunity to learn to code."
 - Learn more at www.code.org.

In 41 states, computer science doesn't even count toward high school graduation requirements. Although programming jobs are growing at double the pace of other jobs, computer programming is declining in our education system. This is a skill that can be taught as early as fifth grade, yet it's not even offered in 90% of U.S. schools. Why isn't today's curriculum preparing our students for the 21st century?
- www.usatoday.com/story/opinion/2013/02/26/computer-programming-coding-education/1947551/

If we provide the tools, inherent curiosity can take our kids pretty far.  One Laptop Per Child dropped off tablets near a group of children who hadli... more »

2013-02-23 03:24:10 (2 comments, 7 reshares, 22 +1s)

I recently noticed that Julia (julialang.org) had finally implemented packages, so I tried it with some real work this week and I love it. This is what I want to be programming in while I grow old. 1-based array indexes make me feel like a real human being instead of some faceless drone in a giant machine.

Try it: julia.forio.com
Architecture doc: arxiv.org/pdf/1209.5145v1.pdf
Packages: docs.julialang.org/en/latest/packages/packagelist

2013-02-22 19:54:56 (3 comments, 2 reshares, 15 +1s)

Another good one ! 

"In order to spread in the body, the flu virus first uses a protein, called hemagglutinin, to bind to the healthy cell’s receptors. Once it has inserted its RNA and replicated, the virus uses an enzyme, called neuraminidase, to sever the connection and move on to the next healthy cell.

“Our drug agent uses the same approach as current flu treatments – by preventing neuraminidase from cutting its ties with the infected cell,” says UBC Chemistry Prof. Steve Withers, the study’s senior author. “But our agent latches onto this enzyme like a broken key, stuck in a lock, rendering it useless.”"

More of the story here
http://www.publicaffairs.ubc.ca/2013/02/21/new-flu-drug-stops-virus-in-its-tracks/

2013-02-18 14:27:09 (3 comments, 3 reshares, 20 +1s)

Scattering Amplitudes and the Positive Grassmannian
Nima Arkani-Hamed et. al. have finally released their long-awaited paper, a monumental work from what I've seen so far. It goes farther than ever before to reconstruct scattering processes from geometric primitives in the cleanest way. The main building blocks are just permutations, depicted by a diagram like this one.
http://arxiv.org/abs/1212.5605

A lof of the material here was discussed by NAH in his talk I posted before: <http://bit.ly/10jz4OE> With this new paper there are many aspects that have been greatly clarified.

The traditional formulation of quantum field theory — encoded in its very name — is built on the two pillars of locality and unitarity. The standard apparatus of Lagrangians and path integrals allows us to make these two fundamental principles manifest. This approach, however,requ... more »

2013-02-17 17:32:42 (19 comments, 21 reshares, 42 +1s)

Amazing mantis photos from EnvironmentalGraffiti.com.

www.environmentalgraffiti.com/news-incredible-life-cycle-praying-mantises-pictures

These fascinating insects are known for their hunting capabilities, camouflage, and cannibalism. In addition to dining on other insects (and themselves), they are fast enough to attack and impale hummingbirds, lizards, scorpions, and snakes.

Flower mantises: www.environmentalgraffiti.com/news-incredible-flower-praying-mantis-pictures

Hunting hummingbirds: www.environmentalgraffiti.com/featured/praying-mantis-vs-hummingbird

Dining: www.environmentalgraffiti.com/news-x-incredible-praying-mantis-photos

Babies: www.environmentalgraffiti.com/featured/praying-mantis-babies

More: www.environmentalgraffiti.com/animals/news-praying-mantis

For #ScienceSunday +ScienceSunday curated by+R... more »

2013-02-14 20:08:14 (2 comments, 2 reshares, 12 +1s)

Stellar Surfaces. Beautifully-detailed video highlights from NASA's Solar Dynamics Observatory. 

NASA's Living with a Star Program (lws.gsfc.nasa.gov)
www.scientificamerican.com/article.cfm?id=the-sun-will-eventually-engulf-earth-maybe. 
#sciencesunday  #scienceeveryday #heliophysics #spaceweather  

2013-02-15 23:13:37 (12 comments, 2 reshares, 5 +1s)

A classic case of unlearn relearn for computer scientists.

2013-02-13 14:56:37 (6 comments, 1 reshares, 9 +1s)

Sure, there's a 190,000-ton space rock hurtling towards Earth at this very moment. But there's no need for anyone to worry -- here's why:

2013-02-03 06:13:27 (1 comments, 1 reshares, 10 +1s)

SciTech #ScienceSunday Digest 5 - 3rd Feb 2013
Cellular insertions, faster data transfer, multiverse metamaterials, 3D chips, mimicking stem cell niches, cloaking particles, and others.

1. Simple and Robust New Method to Insert Material Into Cells.
By running cells in solution through a channel on a microfluidic chip that narrows to between 30% and 80% of the cell’s normal diameter researchers have shown that tiny temporary holes open up in the membrane of the squeezed cells through which large molecules in the solution can slip through http://web.mit.edu/press/2013/putting-the-squeeze-on-cells.html. Using this technique, proteins were controllably inserted into the cell to reprogram it and generate induced pluripotent stem cells with a success rate 10 to 100 times better than any existing method. Nanoparticles, carbon nanotubes, and quantum dots were also inserted witht... more »

2013-01-31 17:45:35 (1 comments, 2 reshares, 14 +1s)

Silhouettes and real time Moon rise

By now you may have seen the magnificent video of the rising Moon taken in real time. But there's more going on here than meets the eye, and I'm more than happy to talk about it.

... and if you haven't seen it, then stop reading this and click! 

http://www.slate.com/blogs/bad_astronomy/2013/01/31/moon_rise_mark_gee_video_of_silhouettes_against_the_rising_moon.html

2013-01-27 19:09:39 (16 comments, 53 reshares, 80 +1s)

Gravity, Branes, and Extra Dimensions.  A short overview of how string theory, branes, and gravitons provide a mind-bending model of gravity - and why it might fall off so quickly with distance (hint: closed strings can leak.)   

#ScienceSunday #M -theory #quantumgravity

Edited as suggested by +John Baez below to avoid an unqualified assessment of the theory's accuracy. :)

2013-01-25 14:14:59 (2 comments, 1 reshares, 11 +1s)

We all marvel at the images of galaxies, stars and other objects in the sky, but do we wonder what sounds they make if any. It is surprising to hear the sound, it does add to the enjoyment at least for me.
Why not explore for yourselves and see what other sounds you can come up with.

2013-01-25 13:47:51 (0 comments, 1 reshares, 9 +1s)

Scientists puzzled by new findings revealing the unexplained exotic behavior of "Chameleon Pulsars"

"A pulsar that is able, without warning, to dramatically change the way in which it shines has been identified by an international team of astronomers.

Using a satellite X-ray telescope combined with terrestrial radio telescopes the pulsar was found to flip on a roughly half-hour timescale between two extreme states; one dominated by X-ray pulses, the other by a highly-organised pattern of radio pulses.

The research was led by Professor Wim Hermsen from The Netherlands Institute for Space Research and the University of Amsterdam and will appear in the journal Science on the 25th January 2013.

Researchers from Jodrell Bank Observatory, as well as institutions around the world, used simultaneous observations with the X-ray satelliteXMM-... more »

2013-01-24 02:02:43 (0 comments, 0 reshares, 10 +1s)

My father once quoted a saying from Maine, where he spent some of his youth: “You can’t get there from here.” It refers to Maine’s winding road system, which often prevents a traveller from taking a direct route between two places. In physics and math terms, we might say that Maine’s road system is of fractional dimension: Less than two-dimensional, but more than one-dimensional.

http://www.thephysicsmill.com/2013/01/20/you-cant-get-there-from-here-dimension-and-fractional-dimension/

#sciencesunday #mathematics

2013-01-19 13:36:54 (2 comments, 1 reshares, 16 +1s)

Dark matter? Or Modified Gravity in some form?

There’s one very simple test that you can apply to tell which of these two possibilities are consistent with our actual Universe, and the large-scale-structure of the Universe only matches one of them.

Why the Universe needs Dark Matter (and not MOND) in one Graph. You cannot ignore physical cosmology.

2013-01-14 16:57:22 (2 comments, 8 reshares, 17 +1s)

This incident has presented us with a curious science fiction conundrum.  Ethiopian kids who can't read can educate themselves with computers?  Is that for real?  How well will it work?

http://www.techrevu.com/php/Review-id.php?id=5533

But Isaac Asimov wrote this in the early 50s.  

http://users.aber.ac.uk/dgc/funtheyhad.html

The ironic thing is, is that he was not expecting it for another 140 years.  What have our educators really been doing for the last 50 years?  But NELL is derived from another science fiction book, Diamond Age (1995) by Neal Stephenson, though Orson Scott Card described something similar in Ender's Game in 1985 it was not as central to the story.

NELL is named from Diamond Age.

http://cscott.net/Publications/OLPC/idc2012.pdf

But the narrative educational technique could have been used via scienceficti... more »

2013-01-13 20:58:08 (1 comments, 0 reshares, 5 +1s)

"The Power of X"
WE ARE Pi combined architecture, dance, math, and music to create the first human arabesque for the TEDxSUMMIT in Doha, Qatar, April 2012.  Hypnotic and beautiful, the video celebrates “the power of x” to multiply great ideas.

http://tedxsummit.ted.com

YouTube: 
TEDxSummit intro: The power of x
The making of video: 
http://blog.ted.com/2012/04/19/video-the-making-of-the-power-of-x
#kaleidoscope   #Sciencesunday

2013-01-13 20:30:25 (21 comments, 61 reshares, 129 +1s)

7 directions, 1.9 million mph - an interesting reminder that "at rest" is relative. :)

The Difficulties of Interstellar Travel, or How the Hell do I Calculate the Way Home?

#ScienceSunday | +ScienceSunday 

2013-01-06 15:32:24 (2 comments, 6 reshares, 45 +1s)

I love this!
#sciencesunday