Good example of the new breed of educational videos — this one asks the question “How much does a shadow weigh?”
[youtube]http://www.youtube.com/watch?v=Do1lm9IevYE[/youtube]
Good example of the new breed of educational videos — this one asks the question “How much does a shadow weigh?”
[youtube]http://www.youtube.com/watch?v=Do1lm9IevYE[/youtube]