Why is human lifespan limited to 120 years?

A 2-million-year-long acid rain event led to the rise of dinosaurs—this kind of disaster could happe

lilunkexue

1 View

How to draw a circle?

lilunkexue

83 Views

They say diamonds are forever, but they can be burned and broken.

haoqiwanhuatong

23 Views

Why do we need to cut a slant on the tree when felling it?

haoqiwanhuatong

10 Views

How to make a Poo-Po-Po boat for Sosuke and Ponyo?

lilunkexue

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Video of early humans taming jello!

gugubushigeji

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It’s time for wild sesame paste to flood the market again, pinch you pinch you pinch you!!

Birenwangmou

21 Views

Mud that can burn: peat

jiajudarenmrwen

132 Views

Enjoy the German anatomy textbook from 110 years ago

アールグレイなnanのzi_02

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How strong is the force of regular CPR? I feel like my ribs are going to break in the next second.

palmer_collins_03

29 Views

Those super cool mechanical series of speed bumps~

jixiepangke

22 Views

How harsh is the environment on a polar research vessel? #PopularScience #Unzip #ResearchShip #Polar

haoqiwanhuatong

28 Views

Record my pregnancy process

wangxiaojin

13.5K Views

Toy Story - The Big Shark Finds Its Teeth

diyao

115 Views

Essential for the bathroom! There's a reason I'm recommending this to you

jixiepangke

10 Views

I just want to be a little environmental guardian #protect the environment #outdoor shooting

huadajiedangong

33 Views

Strength is a kind of primitive beauty

wulingbuluo-zhiyuan

39 Views

Incredible seed growth process!!

jixiepangke

170 Views

The man as a speed bump: the skilled worker

yaki1

47 Views

How difficult is it for a chipmunk to live one more year in the forest~

Weiyifangyingshi

109 Views