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EntertainmentMysterious letter reveals the reason for the disappearance of 1.5 million Khitan people more than 900 years ago
Khitan nomadic people (Khitan), once existed in Central Asia and North Asia. History records that this people built the Liao state and created their own writing.
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Can carp live 10 years in a tank without feeding?
Why do Italy and Switzerland have to redraw the border?
Japanese bullet train accident-free for 60 years
The world's most crowded apartment building: Can accommodate up to 30,000 people, the view inside is overwhelming
World's oldest wine jar contains cremated human bones
America catches strange signal from 1.3 billion light years away from Earth
Two black holes closest to Earth discovered, of a kind never seen before
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