Wednesday, February 1, 2012

alchymista:

It’s February, and you know what that means!
Don’t forget to get your romantic interest one of these cards to demonstrate your true feelings!

Sunday, January 29, 2012 Thursday, January 26, 2012

itsfullofstars:

NASA Day of Remembrance

Each January, we honor the Apollo 1, Challenger and Columbia crews, as well as other members of the NASA family who lost their lives supporting NASA’s mission of exploration. We thank them and their families for their extraordinary sacrifices in the service of our nation.

On this Day of Remembrance, as we remember our fallen heroes with tributes and public ceremonies, I will take part in a wreath-laying ceremony at Arlington National Cemetery. Across the country, all flags at NASA Headquarters and the NASA centers will be flown at half-mast in their memory.

Space exploration is a difficult and dangerous endeavor. We recognize these pioneers’ sacrifices each day with our ongoing commitment to safety. As an agency, we know the risks inherent in each mission. Ensuring the safety of our employees is our highest priority.

The legacy of those we have lost is our ongoing work and the inspiration of generations of new space explorers. Every day, with each new challenge we overcome and every discovery we make, we honor these remarkable men and women. Please join me in working to fulfill their dreams for the future.

Charles F. Bolden, Jr.
NASA Administrator

Rest in peace

Sunday, January 22, 2012
Saturday, January 21, 2012
trighappy:

Carl Friedrich Gauss just signed my Tumblr! I just made this animation tracing out a copy of Gauss’s signature he wrote in a book when he was 17. Quite fantastic and elaborate! Perhaps he just wanted to make it difficult for me. Gauss is somewhat of a legend in the history of maths. Reblog this and he’ll be signing your blog too! [original]

trighappy:

Carl Friedrich Gauss just signed my Tumblr! I just made this animation tracing out a copy of Gauss’s signature he wrote in a book when he was 17. Quite fantastic and elaborate! Perhaps he just wanted to make it difficult for me. Gauss is somewhat of a legend in the history of maths. Reblog this and he’ll be signing your blog too! [original]

(Source: matthen)

ianbrooks:

Meet the Numbers by Grant Snider/Incidental Comics
(via Grant’s tumblr: incidentalcomics)

ianbrooks:

Meet the Numbers by Grant Snider/Incidental Comics

(via Grant’s tumblr: incidentalcomics)
Wednesday, January 18, 2012

(Source: historiful)

Sunday, January 15, 2012
expose-the-light:

What was the first math problem that we needed a computer to solve?
In the 1970s, a remarkable thing was done; a computer was used to  solve a math problem. This, in and of itself, was not remarkable. The  difference engine could do it. But this problem was the first one that  would probably remain unsolved if it weren’t for computers. Find out  about the Four-Color Theorem, and why it needed to be turned over to the  machines, below.
Hey. What’s one hundred and seventeen thousand six hundred and  twenty-two plus three million, four hundred and fifty thousand and  twelve?
You just opened up the calculator function on your computer, didn’t you?
Hey. There’s no shame in that. I’m not even going to solve the  problem, and I’m the one who wrote it. I’m just saying that we’re used  to turning over even relatively easy problems to computers. (Look.  Someone programmed that calculator function. If you waste paper trying  to figure it out, you’re squandering their hard work.)
Even during the 1970s, when computers were harder to come by and  problems were weightier, computers were routinely brought in to solve  things for the people who had access to them. But prior to 1976, they  weren’t required to prove any math problem. They just made  things easier. That is, until Kenneth Appel and Wolfgang Haken used a  computer to prove a 124-year-old conjecture. In 1852, Francis Guthrie  came up with what’s known as the Four-Color Theorem. That theorem stated  that no map needed more than four colors to delineate territories.  Generally, different countries, states, or provinces, were given  different colors on a map. If a mapmaker were armed with four different  colors, there was no territory, or set of them, that could be arranged  in such a way that two adjoining territories were the same color.
No one had found anything to contradict Guthrie, but then no one had  the time to check. Thousands of different cases would have to be tested  before anyone could come to a conclusion. The theorem just wasn’t  practically testable, and so not provable, by humans. In 1976, though, a  human didn’t need to work through all those cases. Appel and Haken  enlisted the help of a machine that worked fast and didn’t mind if its  time was being wasted, and proved the Four-Color Theorem. Mapmakers  raised a bored eyebrow and continued to use however many colors they  felt like using. Computer scientists, though, were impressed.
Image: LR
Via The Mathematical Association of America

expose-the-light:

What was the first math problem that we needed a computer to solve?

In the 1970s, a remarkable thing was done; a computer was used to solve a math problem. This, in and of itself, was not remarkable. The difference engine could do it. But this problem was the first one that would probably remain unsolved if it weren’t for computers. Find out about the Four-Color Theorem, and why it needed to be turned over to the machines, below.

Hey. What’s one hundred and seventeen thousand six hundred and twenty-two plus three million, four hundred and fifty thousand and twelve?

You just opened up the calculator function on your computer, didn’t you?

Hey. There’s no shame in that. I’m not even going to solve the problem, and I’m the one who wrote it. I’m just saying that we’re used to turning over even relatively easy problems to computers. (Look. Someone programmed that calculator function. If you waste paper trying to figure it out, you’re squandering their hard work.)

Even during the 1970s, when computers were harder to come by and problems were weightier, computers were routinely brought in to solve things for the people who had access to them. But prior to 1976, they weren’t required to prove any math problem. They just made things easier. That is, until Kenneth Appel and Wolfgang Haken used a computer to prove a 124-year-old conjecture. In 1852, Francis Guthrie came up with what’s known as the Four-Color Theorem. That theorem stated that no map needed more than four colors to delineate territories. Generally, different countries, states, or provinces, were given different colors on a map. If a mapmaker were armed with four different colors, there was no territory, or set of them, that could be arranged in such a way that two adjoining territories were the same color.

No one had found anything to contradict Guthrie, but then no one had the time to check. Thousands of different cases would have to be tested before anyone could come to a conclusion. The theorem just wasn’t practically testable, and so not provable, by humans. In 1976, though, a human didn’t need to work through all those cases. Appel and Haken enlisted the help of a machine that worked fast and didn’t mind if its time was being wasted, and proved the Four-Color Theorem. Mapmakers raised a bored eyebrow and continued to use however many colors they felt like using. Computer scientists, though, were impressed.

Image: LR

Via The Mathematical Association of America

Sunday, January 1, 2012

scinerds:

skepttv:

2012 & The End Of The World

Why (some) people think the world will come to an end during 2012.

More civil discussion: http://www.reddit.com/r/videos/comments/nwkz4/2012_the_end_of_the_world/

If you would like to help me make more videos please join the discussion on:

Google+: http://goo.gl/vmMwz or Facebook: http://goo.gl/LRvDR

Or suggest ideas and vote on other peoples’ ideas on my channel: http://www.youtube.com/user/CGPGrey

A largely amusing wrap-up as to why humans will be likely to survive another year!

the-star-stuff:

Impressive Lego Sculpture of Albert Einstein

Photo credit: Image 1Image 2

 

First reblog of the year, a giant Lego sculpture of Albert Einstein’s face. I’m okay with this.