Here's why:

* Gravity: While Mars has a much weaker gravitational pull than Earth (about 38% of Earth's gravity), it's still significant enough to keep people firmly planted on the surface. You would feel lighter, but you wouldn't float.

* Atmosphere: Mars' atmosphere is very thin, about 100 times thinner than Earth's. This means there's not enough air resistance to help you float.

What would happen on Mars?

If you were to jump on Mars, you would jump higher and stay in the air longer than you would on Earth. You'd also experience a lighter feeling due to the lower gravity. But you wouldn't float.