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Τρίτη 31 Μαρτίου 2015
Παρασκευή 27 Μαρτίου 2015
Πέμπτη 26 Μαρτίου 2015
Βίντεο: Δείτε τι παθαίνει ένα CD σε υψηλές στροφές
Τι θα συμβεί αν ένας οπτικός δίσκος περιστραφεί με ταχύτητες που ξεπερνούν τις 23.000 στροφές ανά λεπτό; Αυτήν την περιέργεια είχαν οι δύο άνδρες του βίντεο που τοποθέτησαν ένα CD σε έναν κινητήρα ηλεκτρικής σκούπας και κατέγραψαν το πείραμα σε πολύ αργή κίνηση.
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Τετάρτη 25 Μαρτίου 2015
50 Years Ago, NASA Astronauts Smuggled a Corned Beef Sandwich Into Space
On March 23, 1965, astronaut John Young reached into his pocket and offered his crewmate Gus Grissom a corned beef sandwich. It was in the middle of the Gemini 3 mission, and let's be clear, they were in space. It was a silly little prank but one that, man, really pissed off Congress.
Gemini 3 was NASA's first two-man space mission, and among its many objectives was to test newly invented space food. For example, writes Robert Z. Pearlman in Space.com, the test foods were coated in gelatin to prevent crumbling.
The smuggled corned beef sandwich, of course, had no such special coating. Fellow astronaut Wally Schirra had bought the sandwich from Wolfie's Restaurant and Sandwich Shop two days ago and passed it off to Young before the launch. Food doesn't taste so good in space, and it's hard to believe a two-day old corned beef sandwich would be delicious. In any case, Grissom had to put it away after a bite, when crumbs started floating everywhere. Oops, microgravity.
Back on Earth, the House of Representatives' appropriations committee caught wind of the stunt. "A couple of congressmen became upset, thinking that, by smuggling in the sandwich and eating part of it, Gus and I had ignored the actual space food that we were up there to evaluate, costing the country millions of dollars," Young wrote in his memoir. NASA eventually had to assure Congress that no, it wasn't going to allow any more contraband corned beef sandwiches into space.
Young would make several more trips into space with Gemini 10, Apollo 10, Apollo 16, and the space shuttle. Corned beef made it back into space, too, on the first space shuttle flight in 1981 commanded by none other than Young himself.
Read more about the smuggled corned beef sandwich on Space.com.
Top image: John Young (left) and Gus Grissom (right). NASA
via Gizmodo http://gizmodo.com
Δευτέρα 23 Μαρτίου 2015
Τετάρτη 11 Μαρτίου 2015
Τρίτη 10 Μαρτίου 2015
Η CIA «προσπαθούσε να σπάσει το λογισμικό ασφαλείας» του iPhone
Μεθόδους για να «σπάσουν» το λογισμικό ασφάλειας των φορητών συσκευών της Apple αναζητούσαν εδώ και περίπου μία δεκαετία στελέχη της CIA, υποστηρίζει ο ειδησεογραφικός ιστότοπος The Intercept, επικαλούμενος έγγραφα που παρέλαβε από τον πρώην συνεργάτη της αμερικανικής Υπηρεσίας Εθνικής Ασφαλείας (NSA) Έντουαρντ Σνόουντεν.
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Τέλη Απριλίου στην αγορά εννέα χωρών το Apple Watch
Η Apple ανακοίνωσε τη Δευτέρα ότι το ρολόι της, το Apple Watch, θα είναι διαθέσιμο από τις 24 Απριλίου σε εννέα χώρες και οι προπαραγγελίες θα ξεκινήσουν δύο εβδομάδες νωρίτερα. Στην ίδια εκδήλωση, η εταιρεία παρουσίασε ένα υπερ-λεπτό Macbook με οθόνη τύπου Retina 12''.
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Δευτέρα 9 Μαρτίου 2015
Κυριακή 8 Μαρτίου 2015
What it looks like in the Arctic Circle when the Sun never sets
This time lapse shows what 24 hours of a summer day (and I guess, a summer night) looks like in the Arctic Circle. You can see the Sun rising and setting like it normally does anywhere else but instead of disappearing beyond the horizon as the Earth turns, it pops right back up and the world never turns dark.
It's like living inside a 2D side scrolling video game. The time lapse was filmed by Maxie Max.
SPLOID is delicious brain candy. Follow us on Facebook or Twitter.
via Gizmodo http://gizmodo.com
Πέμπτη 5 Μαρτίου 2015
Imaging a supernova with neutrinos
Supernovae produce a flood of neutrinos, but we'll only ever see a few of them.
via Ars Technica http://arstechnica.com/
via Ars Technica http://arstechnica.com/
Τετάρτη 4 Μαρτίου 2015
Τρίτη 3 Μαρτίου 2015
The First Detailed Image of the World's Smallest Known Life-form
This picture might look a little grainy, but you're actually looking at the first detailed image of the ultra-small bacteria that are believed to be "about as small as life can get."
The image was acquired by scientists from the U.S. Department of Energy's Lawrence Berkeley National Laboratory and the University of California, Berkeley. The ultra-small bacteria, thought to be fairly common, are difficult to image—not just because they're small, but also because they're quite delicate and can easily die. These samples were captured by being flash frozen to -272 degrees C before being transported to the lab.
While they're common, their role in the natural world is poorly understood. "They're enigmatic. These bacteria are detected in many environments and they probably play important roles in microbial communities and ecosystems. But we don't yet fully understand what these ultra-small bacteria do," explains Jill Banfield, one of the researchers who acquired the images using cryogenic transmission electron microscopy.
It is thought, however, that this is as small as a cell can be while still accommodating enough material to sustain life. With an average volume of just 0.009 cubic microns, they're certainly pretty small; in fact, you could fit more than 150,000 of them into the same volume as a single E-coli cell. And now, you known what they look like. [Nature, Berkeley Lab via Engadget]
Image by Berkeley Lab
via Gizmodo http://gizmodo.com
Δευτέρα 2 Μαρτίου 2015
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