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0:16:17
In these archived webcasts from inside the American Association for the Advancement of Science (AAAS) exhibition hall, watch as Exploratorium senior scientist Tom Humphrey challenges some of the top scientists in the world to explain the phenomena behind selected exhibits from the museum floor. In this webcast: the String Squirter exhibit, as explained by a guest physicist Leon Lederman.

0:29:37
In these archived webcasts from inside the American Association for the Advancement of Science (AAAS) exhibition hall, watch as Exploratorium senior scientist Tom Humphrey challenges some of the top scientists in the world to explain the phenomena behind selected exhibits from the museum floor. In this webcast: the String Squirter exhibit as explained by physicist and Nobel laureate Leon Lederman

1:00:07
Watch as the best teachers on the planet battle it out for the title of Iron Science Teacher. In this zany competition teachers will have ten minutes to create a science activity. This week’s “secret” ingredient: food coloring!

0:23:03
In these archived webcasts from inside the American Association for the Advancement of Science (AAAS) exhibition hall, watch as Exploratorium senior scientist Tom Humphrey challenges some of the top scientists in the world to explain the phenomena behind selected exhibits from the museum floor. In this webcast, the Benham's Disk exhibit explained by guests from the Mathematical Sciences Research Institute in Berkeley and University High School in San Francisco

00:02:00
Here are some other cool things to try with your warm pan of soapy water: turn down the heat, turn up the heat, add other colors and see what spectacular patterns develop!

00:02:38
Warm things are less dense than cool things. Temperature differences and gravity will cause localized areas of fluid to rise or sink, causing convection currents.

00:02:26
Visualize the fluid motion of convection cells! Here are some helpful tips especially for teachers, and a variation on the pie pan method.