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EntertainmentListed the most dangerous dogs in the world
There are many factors to assign marksHow has the most loyal human friend changed in 100 years
After 100 years since 1915, the dogs have changed dramatically.
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One of the loneliest species on Earth, living 2,800m underground and surviving on radioactive energy
The meaning of Christmas tree lighting ceremony
Earth's inner core is 'deforming' discovered
5 special objects on the NASA robot that landed on Mars
Woolly mammoths turned out to be a staple diet for prehistoric North Americans
Can humans travel forward or backward in time?
Finding the mysterious 'monster' that is making the universe expand
How long is the flight to the Moon?
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