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21139 |
duddy |
9 years ago |
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16346 |
duddy |
9 years ago |
Rockets of the world
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No, we're not referring to the candy. Humanity has done great! Here's a more intricate version of the poster above. It was created by professor Peter Alway and was published in the book Rockets of the World: ...
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13756 |
duddy |
9 years ago |
Sunlight continues to damage skin even after dark
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Researchers have discovered that sun exposure gives skin cells a postsunshine hangover that lasts for hours. In fact, UV rays damage skin cells for hours after you've stepped out of the sun - and even if you're in complete darkness!
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15495 |
duddy |
9 years ago |
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8551 |
duddy |
9 years ago |
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21598 |
duddy |
9 years ago |
She developed the building blocks for modern 'software engineering'
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Margaret Hamilton was the leader of the team that developed the flight software for the agency's Apollo missions. The concepts she and her team created became the building blocks for modern 'software engineering.' One example of the value of Hamilton's software work occurred during the Apollo 11 mission. Approximately three minutes before Eagle's touchdown on the moon, the software over rode a command to switch the flight computer's priority processing to a radar system whose 'on' switch had been manually activated due to a faulty written operations script provided to the crew. The action by the software permitted the mission to safely continue. Source: http://history.nasa.gov/alsj/a11/a11Hamilton.html ...
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20990 |
duddy |
9 years ago |
This knife can cut a water droplet in half!
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It's called a superhydrophobic knife and it slices water droplets easier than a butter-knife cuts through butter. As its name suggests, anything that is 'superhydrophobic' is highly hydrophobic, i.e., extremely difficult to wet. This special knife uses polyethylene - a common plastic - zinc, and copper. Its surfaces was dipped into a solution of silver nitrate and a superhydrophobic solution called HDFT for 20 seconds, and once it was washed and air-dried, it was super-great at repelling water.
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10709 |
duddy |
9 years ago |
What do sounds look like?
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In this video, sand is sprinkled onto a metal plate attached to a speaker, which is then turned up the to bring the whole thing to life in a pulsating, dance of intricate patterns.
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15489 |
duddy |
9 years ago |
We are the stars, we are the universe
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I'd like to share this mind-opening video. Astrophysicist Dr. Neil DeGrasse Tyson was asked by a reader of TIME magazine, "What is the most astounding fact you can share with us about the Universe?" This is his answer. By far, one of the best...
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4509 |
ehd123 |
9 years ago |
Rosetta's Comet - Update
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Remember Philae? That little lander that was targeting comet Rosetta? https://biology-forums.com/index.php?article=1050It was very big news around two months ago... Sadly, Philae landed incorrectly in a rather awkward position due to technical failings. After all, it was trying to land on the harsh, unstable, deteriorating/burning up surface of a comet. It bounced three times to a site away from the targeted position and ended up in a shady place with insufficient sunlight to recharge its energy reserves. And so it died out after 60 hours of touchdown. Recent tabloids have now reported that Philae is missing! Scientists from the European Space Agency have tried to analyze the images that Philae returned but things just keep on getting more ...
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13013 |
ehd123 |
9 years ago |
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12952 |
duddy |
9 years ago |
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10986 |
duddy |
9 years ago |
Brilliant minds
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Colourized photo featuring some of the greatest science thinkers of our time, including Curie, Durac, Pauli, Einstein, Schrodinger and more. Can you name them all? ...
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6323 |
duddy |
9 years ago |
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5984 |
duddy |
9 years ago |