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EntertainmentDiscover the sophisticated water system of the ancient Arabs
Nabataea, an ancient Arab kingdom, built a water collection and distribution system that is still usable after thousands of years.Top 10 ancient weapons that still cause 'hairs on the back of the neck' to this day
Here are brutal weapons that can injure even the most intrepid ancient warriors.
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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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