Amy Lutkenhaus

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Why do cats purr?

These comforting sounds are good for them and for us, too.<p>It's easy to assume that cats purr because they're happy. After all, when your kitty …

Nanofiber bandages could safely seal your next wound

Over-the-counter liquid bandages are great for sealing up minor cuts and scrapes, but sutures are still required to close most surgical incisions and deeper wounds. A group of scientists at the University of Maryland, however, have devised a way to apply a layer of 370 nanometer-wide biodegradable …

Neurosurgeons successfully implant 3D printed skull

A 22-year-old woman from the Netherlands who suffers from a chronic bone disorder -- which has increased the thickness of her skull from 1.5cm to …

Seeing Cells As They’re Meant To Be Seen: In 3-D

Here's the big picture<p>Cells live in a three-dimensional world, but until recently, scientists using fluorescence microscopes could see them well in only two dimensions. With advances in confocal microscopes, which use pinhole apertures to focus light on several planes, scientists can now view …

Microscopy

APOD: A Milky Way Dawn (2014 Mar 29) Image Credit & Copyright: Babak Tafreshi (TWAN), ESO Ultra HD Expedition http://apod.nasa.gov/apod/ap140329.html Explanation: As dawn broke on March 27, the center of the Milky Way Galaxy stood almost directly above the European Southern Observatory's Paranal Observatory. In the dry, clear sky of Chile's Atacama desert, our galaxy's dusty central bulge is flanked by Paranal's four 8 meter Very Large Telescope units in this astronomical fisheye view. Along the top, Venus is close to the eastern horizon. The brilliant morning star shines very near a waning crescent Moon just at the edge of one of the telescope structures. Despite the bright pairing in the east, the Milky Way dominates the scene though. Cut by dust lanes and charged with clouds of stars and glowing nebulae, the center of our galaxy sprawls across the darker zenith even as the deep blue sky grows brighter and buildings still glint in moonlight. http://twanight.org/tafreshi http://www.eso.org/public/outreach/ultra-high-definition/ Starship Asterisk* • APOD Discussion Page http://asterisk.apod.com/discuss_apod.php?date=140329 #APOD

First Asteroid With Rings Discovered

Move over, Saturn—rings aren't just for giant planets anymore.<p>Saturn has rings, of course, and so do the other gas giants of our solar system—Jupiter, Uranus, and Neptune—albeit wispier ones than Saturn's.<p><b>But until now it seemed that only giant planets had the gravity to hold on to the billions of</b> …

Big Pic: Lightning As Seen From The International Space Station

Nature's work vies with humans' city lights.<p>Zeus's work looks pretty impressive from this viewpoint, doesn't it? But humankind's city lights look just as fiery.<p>An International Space Station Expedition 38 crewmember took this photo of lightning over the Middle East in December 2013. Besides taking …

Space

Black death skeletons reveal pitiful life of 14th-century Londoners

DNA from emaciated London Black Death skeletons matches modern plague bacteria and supports airborne theory of spread<p>The 25 skeletons unearthed in the Clerkenwell area of London a year ago may hold the key to the truth about the nature of the Black Death that ravaged Britain and Europe in the …