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EntertainmentTwo black holes closest to Earth discovered, of a kind never seen before
Two black holes lurking in Earth's backyard, just 1,560 and 3,800 light-years away, represent a type astronomers have never seen before.Unexpectedly discovered a black hole near the Earth that so far we did not know
The newly discovered black hole lies in the star system HR 6819, 1,011 light-years from Earth and four times the mass of the Sun.
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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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