What Explains Past Climate Change?
scientificamerican.com — Roughly 1,000 years ago, Europe enjoyed several centuries of balmier average temperatures. Dubbed the "Medieval Warm Period," it was the last time before the present that agriculture could flourish in Greenland. (Submitted by NewsFeed) More...
Are Your Siblings Really Your Siblings?
scientificamerican.com — So if you’re American you’re probably eating Thanksgiving this Thursday with your close friends and family. And you’re probably pretty certain you can recognize your siblings right? But what makes you so certain they are genetically connected to you? (Submitted by NewsFeed) More...
Solving the Mystery of HIV Carriers Who Don't Contract AIDS
scientificamerican.com — More than half a million people in the U.S. have died from HIV infection, and more than a million currently live with the virus, but a relative handful of people infected with HIV never get treatment for it and never get sick from it. (Submitted by thegamingguy) More...
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