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Perhaps we have studied many of the penis of humans but have little knowledge about the penis of other animals.Scientific proof: 'Little boy' only 12.5cm will be difficult to have children!
American scientists prove that men should be more concerned about their reproductive health if they feel
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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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