In a message to greet the Chinese New Year, also known as the Spring Festival, Manet said the peoples of Cambodia and China have always stuck together through thick and thin since ancient times.

DNA analysis of that tiny fossil led to the 2010 finding that it represented a distinct ancient human ... fossils of these extinct ancestors are still few and far between — experts in human origins ...

But this 18-year milestone was not always the case. Chinese ancestors became adults at different ages and stages. Males in ancient China officially became adult at 20 and females at 15. And big ...

This week, meet a big-brained ancient human relative, hear a meteorite as it lands on Earth, spot a tiny kangaroo-like marsupial, and more.