He had thought about getting a ride, but the low gravity made walking a fairly efficient way to get around.

As a plane moves forward, gravity makes it curve down.

Lunar gravity makes it easy to get the most out of what a man has left.

He was young, near the same age as the brother and sister, yet the gravity of his expression made him seem older.

"Same rules as everywhere else; it's just that the gravity makes everything more obvious."

When you flush the toilet, gravity makes the water go down.

What they did not realize was that the lower gravity would also make it easier for her to fight them.

"You can't put too much on at once, because gravity will make it fall," she says.

The gravity, though, made him start to feel tired long before he would have on Earth.

But Mars' low gravity makes walking easy work even over rough ground.