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Stuart Firestein: "Ignorance: How It Drives Science" (Rebroadcast)

A neuroscientist claims that ignorance--not knowledge--is the true engine of science. He explains how scientists use ignorance to concentrate their research, and why "not knowing" is one of the greatest benefits to science.

NPR

How Much Does A Hamburger Cost? That Depends

There are many informational graphics demonstrating the environmental impact of beef consumption. But a lot of the numbers just don't match up. As it turns out, calculating what goes into (and comes out of) a cow is not an exact science.
NPR

Why Can Some People Recall Every Day Of Their Lives? Brain Scans Offer Clues

People with extraordinary autobiographical memories also tend to have obsessive tendencies, researchers are learning. Brain scans reveal structural differences in the brains of these people, including a larger-than-normal caudate, a brain area linked to OCD.
NPR

Solar Toilet Disinfects Waste, Makes Hydrogen Fuel

The Reinvent the Toilet Challenge asked engineers to dream up a replacement for the antiquated flush toilet. Michael Hoffmann and his team at Caltech responded with a solar-powered toilet that disinfects waste and reuses wastewater to flush. Better yet, it pumps out hydrogen gas for use in fuel cells.
NPR

Aging City Pipes In Need Of A Plumber's Touch

A typical American family uses 400 gallons of water a day. But the pipes that ferry that water are bursting faster than they can be replaced. George Hawkins, general manager of DC Water, and environmental historian Martin Melosi discuss past and present issues with pumping water into cities.
NPR

Massive "Phoenix Cluster" Supersizes Star Creation

Writing in the journal Nature this week, astronomers say they've found a massive galaxy cluster that's pumping out stars at a record pace. Astronomer Michael McDonald describes the finding, and explains what might be causing the "Phoenix Cluster" to be in celestial overdrive.
NPR

Actress Danica McKellar Helps "Girls Get Curves"

In her newest book "Girls Get Curves: Geometry Take Shape" actress and math education advocate Danica McKellar teaches readers geometry, using her signature "girly" style. McKellar discusses the book, and tells why she chose to pair geometry lessons with tips for exercise and eating.

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