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00:27:55
It's geometry! It's knitting! It's—hyperbolic crochet! Artist and science writer Margaret Wertheim shows you how to represent a hyperbolic plane using crochet hooks and yarn. Beginning with a simple crochet chain, learn how to create a geometric shape with a constant negative curvature just by adding stitches.

00:54:10
In this zany competition teachers have ten minutes to create a science activity from a special secret ingredient. This week: sugar.

00:33:42
Tinkerer, programmer, and musician Ken Murphy shows how to build electromechanical "bugs" built from scavenged materials and powered with a single coin-cell battery. When the Blinkybug's wire antennae detect motion from air currents or vibrations, the bug comes to life, with its LED eyes blinking in rhythmic patterns.

01:01:45
In this zany competition teachers have ten minutes to create a science activity from a special secret ingredient. This week: baseball equipment.

00:47:04
In this zany competition teachers have ten minutes to create a science activity from a special secret ingredient. This week: plastic water bottles.

00:31:01
In this interactive presentation with Exploratorium biologist Karen Kalumuck, find out how flowers entice bees, what bees see in a flower, and the importance of bees to agriculture. Also learn about Colony Collapse Disorder, which is causing once-thriving honeybee colonies to disappear.

00:38:30
The Cassini spacecraft continues to orbit Saturn, sending back astonishing images of the ringed planet and its moons. Join us as we look at the latest images and do some hands-on activities to help us understand.

Join host Mary Miller and Dr. Mickey Glantz in a discussion on issues around climate change and how it may affect communities.

00:29:34
Join Exploratorium staff scientist Charlie Carlson as he continues to examine issues around the Gulf Stream and climate change.

00:31:36
The two Mars Rovers are alive and well after surviving their second Martian winter. Come and see photos of discoveries they made during their third year on Mars, with Exploratorium Senior Scientist Paul Doherty.