Question: if gravity was not here what would happen

Liza Sazonova answered on 10 Nov 2020:

Easy – we’ll fly!
.
If you are in space, you can fly around all you want without falling because there’s nothing pulling you down. You can try this on Earth too: there are special airplanes that take people up and then plunge down, re-creating a zero-gravity experience. I’ve never tried it because it’s really pricey, but should be fun 🙂
.
But there are lots of other things on Earth that are caused by gravity indirectly. Our whole planet would be a very different place!
.
The reason we have air is partly due to gravity. If the Earth had no gravity to pull the air in, then it would all escape into space and we’d have nothing to breathe. Gravity is not enough though; for example Mars has gravity, but no air.
.
In even less obvious ways, the reason plants and animals grow taller is also gravity (and competition between other plants and animals). If there was no gravity – but somehow, air – trees wouldn’t have a reason to grow tall as they could just float around 🙂
.
Gravity defines many many things in the way our planet was born, the way life was formed and how we live. Without gravity, we wouldn’t have all of those.