Mars helicopter

An airman once told me that a helicopter flies by "beating the air into submission." It needs air, denser air than an airplane; that's why helicopters can't fly as high as airplanes where the air is less dense. 

But NASA has come up with a helicopter that can fly on Mars, where pressure on the surface of the planet is only about 1% of pressure on earth's surface.

Mimi Aung is NASA's lead engineer developing this helicopter (named "Ingenuity"). It will land on Mars next February with the rover and take three test flights - the first helicopter to fly on another world.

from Space