do we really need gravity?

You've already answered your question. Most of requirements for life are fulfilled by gravity. So its obvious that we need gravity. But We exactly can't understand why only gravity can do all this?

Well, it wouldn't be very nice without gravity as we would start floating around in the air or maybe even drift off into outer space and suffocate because of the lack of air! Even if we did have air to breathe, our muscles would grow slowly weaker and we would find great diffictulty in staying in any one place. That would mean that we could keep losing each other! But for some, maybe that is not such a bad idea! _Derek

If we never had any gravity we would not need it because we would not be here. Without it the galaxies would not have formed, nor would the sun or the earth

of course we do, imagine everything else floating everywhere. Can you handle it?

I'm afraid we do need gravity. Our muscles wouldn't work properly without gravity. I'm sure you heard about astonauts and how many problems they have in space from toilet till simple walking. And our houses and cars and everything what we built on Earth. How it would work without gravity. I can imagine that our houses would drift like ships without anchors.

ya of course, according to science, we have really need gravity . if gravity has lost from this world then, finally we always fly in air or we can say that we feel vaccum nature

Without gravity, everything would be floating in the air. Life like that is hard to imagine. So when everything on the earth came into being, it is there with all that is basic for us humans and animals and plants to live on. We do need gravity.

Gravity is the reason that the earth stays together in the first place. If there was no such thing as gravity, ever, then the entire universe would either have never existed, or it would just be single atoms of hydrogen, making it impossible for life to evolve. If gravity was just suddenly gone, then as earth kept spinning around, everything would leave the earth. Every drop of water on the planet would rise over the land, everything would start to float, and soon enough, go outside the atmosphere, where the half facing away from the sun would freeze, and the half facing the sun would burn up. Even if you grabbed onto something stable in enough time, all of the air would be leave earth, making it so you can't breathe. Even if you made a box that was attached to the ground, then within a week to a month, the earth would be so far away from the sun, it would freeze over, and you'd run out of everything. The whole reason we're here, one of the biggest pieces to why we can live in the first place, is because of gravity. Don't get rid of it.

It's hard to imagine life without it. I won't say it's an absolute must, though. weightlessness is fun and I wish it was easily accessible.

Well, need it or not it is here to stay! Haha. But, I'm rather glad that it is here because by nature of it's function we are able to stay rooted to the earth. However, what I always wonder is why it was named gravity in the first place. I think it would serve it's purpose just as well if it was named something else. It is interesting to think of how people came up with concepts and such. I think it's funny that the scientist that is credited with 'discovering' gravity is said to have done so when an apple fell and he thought about it and decided that it was made to fall because of gravity. So, does this mean that before him no one was curious enough to think of such a thing? I mean humans were around for quite awhile before he came on the scene. What did they refer to as the thing that made us stay to the earth and made things fall. Some of the early scientist don't really seem all that smart to me that they were the first to think of this and it's really simple stuff.

Yes, we do need gravity.Totally say that it will make the life difficult if we need to face and live in a world without gravity. Can't you imagine yourself floating here and there which hardly for you to control that. There is no way to live without gravity. Remember that it could effect the physical or the body as our bone will have less density and it is not good for the body. There are many more effects of having no gravity. So yes we need it!(^^)

of course we need gravity, did you that with out gravity people would get old twice faster than usually. and how could we exist with out gravity which keep everything in place where they belong, how would you fly if you don't exist or mashed by all kind of things that we all know would happen without gravity, just think about it, just imagine all the building the big ones, what would happen.

yes.

Yes, Indeed we need gravity to perform daily tasks easily. It would be hard for us to perform actions while floating in the air. It would be a great experience if there's no gravity for just 1 day. I can explore and move to different areas of the earth but still I prefer living with gravity.

Well we need it for things to stay where they are, as without it, everything in the universe would be floating aimlessly around all over the place, without direction. Imagine if two huge planets, say Uranus and Saturn collided simply because of having no gravity, thus no path.

We do, but being an overweight person, there are times I wish we had less of it!! But gravity is what helps this planet keep our position in this solar system. Heaven knows where we'd be floating around without it. Definitely either much further away from the sun and getting even further, or pulling into the sun. But thanks to the surrounding planets that keep us away from the sun, and the sun itself for giving us an orbit, we're in a perfect position to be to survive. So yes. I think we really need it.

Dude the whole concept of the earth and universe is just gravity. Without gravity nothing can exist. Have you read about the newton laws of gravity? If yes then all the ans is ther only. Each and every part attract each other by a force and that is gravity. It no the gravity that cause rain and snowfall but due to gravitaional pull rain and snows fall on the earth from the sky.

Yes we need gravity. Gravity is one of the four fundamental physical forces. It is a weak force on the level of atoms, it affects large objects- like our planets, stars, and galaxies. With just lower gravity the stars would be smaller, and the pressure of gravity in their interiors would not drive the temperature high enough for nuclear fusion reactions to get under way, so the sun wouldn't be unable to shine. So we definitely need gravity, we wouldn't be able to survive for very long without it.

yes, in order for our muscles to work better, because thru gravity, our muscles in our tights exert efforts (thus do exercises in a natural way). and thru gravity, the reason why those sands and seas are compact each other or else dust, stone, seas, sands, etc... are all mixing up together on an informal way.... like a sand storm in the dessert without shape.... earth means dirt, and those dirt are all temporary sticked together because of the gravity force acted on the center of the earth's magnetic core.....

We need gravity for many reasons, but the most important reason is that it keeps us here on Earth. Trust me, you don't wanna know what would happen if we floated up into space, besides the whole no oxygen thing. Lol...