6 Remarkable talks

The first three examples have been shown at a teacher training orientation on September 1, 2009. Click on the picture to watch the entire movie clip. Oliver Knill, September 2, 2009
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Carl Sagan: Eratosthenes
External link to entire movie:
How Eratosthenes calculates Earth's cirumference
1980
Play the flash version (.swf)..
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Bonnie Bassler: How Bacteria Talk
External link to entire movie:
A talk of Bonnie Bassler in TED
2009
Play the flash version (.swf)..
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Steven Strogatz: Sync
External link to entire movie:
Mathematician Steven Strogatz demonstrates synchronisation in nature
2004
Play the flash version (.swf)..
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Arthur Benjamin: Methemagic
External link to entire movie:
A talk of Arthur Benjamin in TED
2005
Play the flash version (.swf)..
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Jeff Han: touchscreen
External link to entire movie:
A talk presenting technology innovation of breakthrough touchscreen
2006
Play the flash version (.swf)..
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Ron Eglash: African Fractals
External link to entire movie:
The Ethno-Mathematician Ron Eglash illustrates African fractal patterns
2007
Play the flash version (.swf)..