What if a human was so big that his head were in space

Would he survive? What would happen to earth?

If he had the same proportions as a normal-sized human his bones would crumble under the weight of his body. If you double the height of a body the cross-sectional area of the bones increases four-fold but the mass they have to support increases eight-fold. In other words if you increase the height by a factor of x then the force on the bones also increases by a factor of x. That's why elephants have such thick legs compared to, say, gazelles.

If you had your head in a vacuum the linings of your eyes, nose and throat would be freeze-dried - the water in them would simultaneously boil and freeze. And of course you would have nothing to breathe so you would suffocate. It wouldn't be pleasant.

Space by definition starts at 62 miles above the surface of the Earth (327,360 feet). If we assume the average adult human is 6 feet tall and weighs 200 lbs, a "human" 327,360 feet tall would weigh 10,912,000 pounds or 5,456 tons.

By comparison, Mount Everest weighs approximately 32.7 million times more than that.

Nothing would happen to the Earth if he just stood there, as unless he's an alien, he's born entirely from elements already from the Earth and therefore the weight of the Earth as a whole would remain the same. If he jumped however (kinetic energy), that would most certainly affect Earth on a global scale.

Lol I was thinking about something like this the other day anyways if you were tall and fairly big (outward) not super skinny he may cause the earth to be pushed out of its gravitation orbit with the sun if he were to jump that is but he would die most defiantly due to the pressure in space and the no o2

His head would implode due to the pressure in space.

His head would explode do to the pressure

He would be called "Vacuum Head".

im just saying, not sure about it, but i think that that would never, ever, ever happen. Ever.