These teacher-tested activities use free or familiar tools to help students think critically, create meaningfully, and ...

Explaining how a fly inside a rocket traveling near the speed of light cannot break the light barrier due to relativity.

When an intense laser pulse hits a stationary electron, it performs a trembling motion at the frequency of the light field.

Watch as aircraft wings flex under aerodynamic forces during take-off and flight. This video highlights the incredible ...

The United States lost the war against a weapon that almost everyone knows by its acronym: the IED or improvised explosive ...