Dina

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APOD: The View Near a Black Hole (2014 Mar 23) Illustration Credit: April Hobart, CXC, NASA http://apod.nasa.gov/apod/ap140323.html Explanation: In the center of a swirling whirlpool of hot gas is likely a beast that has never been seen directly: a black hole. Studies of the bright light emitted by the swirling gas frequently indicate not only that a black hole is present, but also likely attributes. The gas surrounding GRO J1655-40, for example, has been found to display an unusual flickering at a rate of 450 times a second. Given a previous mass estimate for the central object of seven times the mass of our Sun, the rate of the fast flickering can be explained by a black hole that is rotating very rapidly. What physical mechanisms actually cause the flickering -- and a slower quasi-periodic oscillation (QPO) -- in accretion disks surrounding black holes and neutron stars remains a topic of much research. http://chandra.harvard.edu/ Starship Asterisk* • APOD Discussion Page http://asterisk.apod.com/discuss_apod.php?date=140323 #APOD

Verizon to Publish Transparency Report Amid NSA Furor

Civil liberties groups and public interest advocates have been urging Verizon and AT&T, the nation’s largest telecommunications companies, to be more …

Turn A Heart On And Off With The Flick Of A Switch

Stanford scientists are working on a light-controlled pacemaker.<p>A heartbeat is really a pretty magical thing. Every time that beautiful little hunk of muscle in your chest wants to send blood rushing around your body, it requires an electrical signal generated by your body to tell it to do so. This …

Seven Foods You Should Never Eat

Looking forward to hearing what everything thinks of this one:<p>Clean eating means choosing fruits, vegetables, and meats that are raised, grown, and …

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Moving Atoms: Making The World's Smallest Movie

The magic of the Internet

Empty Space is NOT Empty

Saturn's Hurricane Is a Super Storm on Steroids, Even for the Solar System

This article is from the archive of our partner .<p>Now that we've got our first good look at it, let's put the mega storm on top of the sixth rock from …

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Behaving like animals: The Bonobo and the Atheist | Tessa Kendall

Is human nature a beast that needs to be tamed? Should we "throw out Darwinism in our social and political lives"? Or are we naturally altruistic, …

Einstein was right – so far

Record-breaking pulsar takes tests of general relativity into new territory.<p>Astronomers have used ESO’s Very Large Telescope, along with radio …

Bioengineers 3D print tiny functioning human liver

A US biotechnology company has 3D printed a tiny functioning liver in the lab that survived just over five days -- more than twice the life …