Fossils show ravens lived alongside early humans in Beijing

While ravens do not occur in China's capital Beijing today, a new study analyzing fossil bird bones from the UNESCO World Heritage Zhoukoudian "Peking Man" site demonstrates that ravens lived in western Beijing at the same ...

Early humans: Tooth enamel reveals life histories

If you take a magnifying glass and a flashlight and look at your teeth very carefully in the mirror, in places you can spot a pattern of fine, parallel lines running across your teeth. These correspond to the striae of Retzius ...

Stellar explosion in Earth's proximity

When the brightness of the star Betelgeuse dropped dramatically a few months ago, some observers suspected an impending supernova—a stellar explosion that could also cause damage on Earth. While Betelgeuse has returned ...

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