-
01:24
Overseas super-large sweeping robots, specially used to clean up pig manure, are much more efficient than manual ones. -
02:59
No laughing or crying, there is a fake old Beijing snack in Beijing Snack Street. Businessmen do it in old Beijing. -
01:59
Workers dug up mysterious mines and 200 Shredons were seen again. Experts: at least 5 billion -
02:19
"June 1st" International Children's Day Paradise, Labor People's Cultural Palace -
00:15
How did the electric man think that he lost his life! No chance to respond at all -
02:10
India's largest "human flesh laundry" uses muddy sewage to wash clothes. Why not use a washing machine? -
01:19
Three children out of danger of life, the lowest need not amputation -
00:50
It's a pity that the only female turtle in China died after artificial insemination. -
00:33
"All Good" Xiaomi and Su Daqiang share the same frame again. -
01:09
Ancient "King of Poisons" Hedinghong, what is it? We all have access to it.
Home >Anecdote > Why are birds' nests open to the sky?
Why are birds' nests open to the sky?
Guess what you like
Hot Video
Last Update