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Looking down from Kazakhstan, we discover a mystery that even leading scientists cannot explain: a huge mystery from the old days still lying on the ground.The 10 most interesting mysteries of lost civilizations (Part 2)
America was discovered by Christopher Columbus in 1492, but there is much evidence that explorers from many other civilizations came to America before Columbus.
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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
Solar sails help spacecraft reach Mars in 26 days
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