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12:44:38
This special edition of Iron Scence Teacher is part of our celebration of the Teacher Institute's 21st birthday. 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.

1:17:34
How do opera singers sing loud enough to be heard over an orchestra? Can an opera singer's voice really break a wine glass? What's the difference between a baritone and a soprano? Discover the answers to these questions—and more!—in this presentation for families. Join physicist and composer Dr. Brian Holmes and San Francisco Opera Center Director Sheri Greenawald to explore how the art and science of singing combine in opera.

00:53:00
A discussion about the artistic, scientific, and moral interpretations of J. Robert Oppenheimer and his legacy as the father of the atomic bomb. Composer John Adams and librettist Peter Sellars of the Doctor Atomic opera are joined by Richard Rhodes, author of the Pulitzer Prize-winning book, The Making of the Atomic Bomb. Kip Cranna, musical administrator at the San Francisco Opera, moderates.

00:60:00
A discussion about the artistic, scientific, and moral interpretations of J. Robert Oppenheimer and his legacy as the father of the atomic bomb. Composer John Adams and librettist Peter Sellars of the Doctor Atomic opera are joined by Richard Rhodes, author of the Pulitzer Prize-winning book, The Making of the Atomic Bomb. Kip Cranna, musical administrator at the San Francisco Opera, moderates.

12:47:56
The concept of space-time--perhaps Einstein's most fundamental contribution to our understanding of the universe--will be explored using special red lasers.

00:42:10
Exploratorium Senior Scientist, Dr. Paul Doherty, takes us through the Photoelectric Effect and the "invention" of photons.

00:23:04
Using a simple ball-bearing model, Exploratorium Senior Scientist Dr. Paul Doherty demonstrates Brownian Motion and explains how it proves the existence of atoms.

01:04:45
Watch as Exploratorium staff and local teachers compete for the title of Iron Science Teacher. Each contestant has ten minutes to make a science lesson out of a secret ingredient. Today's secret ingredient-potatoes!

1:11:41
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: Milk!

00:33:02
Take a look inside a comet! Launched on Jan. 12, 2005, the Deep Impact spacecraft hurtled through space on a collision course with an enormous comet. Join senior scientist Paul Dougherty as he explores this exciting mission.