Archimedes' seesaw

This animation introduces the studies of astronomers and physicists whose works...

In this experiment we prove that it is possible to cut a bottle with just a string.

A hot air balloon is a balloon aircraft which is lifted by hot air.

In certain cases, liquids do not mix together, and form layers instead. See what happens when we...

A spectacular optical illusion using a chain of closed rings.

How does a piece of a cork behave on the surface of a glass of water? You can examine that in...

A spacecraft on its path is in a constant state of free fall.

What is the speed of sound? What happens when an object exceeds the speed of sound?