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EntertainmentPhenomenon 'The ghost sun' is rare in the sky of Sweden
The halo appears when sunlight refracts through the cirrus clouds at an altitude of nearly 6,100 meters above the ground.'Rare and difficult to find' natural phenomena
Nature always contains secrets that make people curious to discover.
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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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