PBS
Pbs Learning Media: Einstein: How Smart Was He?
This essay from the NOVA Web site explores the impact Einstein made on physics and most everything we know about the cosmos.
PBS
Pbs Teachers: Time Travel
Use this NOVA lesson to discuss the nature of time and the grandfather paradox. Examine time from different perspectives by plotting ages on a timeline, estimating how long a minute is and imagining going back in time to change something...