In the summer of 2008, Russian researchers dug up a sliver of human finger bone from an isolated Siberian cave. The team stored it away for later testing, assuming that the nondescript fragment came ...
The Nefud Desert in northern Saudi Arabia. Credit: Hermes Images/AGF/UIG via Getty Images Even for a desert, the Nefud is nearly bone-dry. Only about an inch of water falls onto the red, sandy soil in ...
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