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Joe Palca

Sir Harold Walter Kroto died on April 30, and I've been thinking a lot about him ever since.

Harry, as he preferred to called, was one of the most remarkable people I've ever known.

We met in 2013 when I was moderating a panel of Nobel laureates at the International Science and Engineering Fair in Phoenix. He was obviously smart, having co-discovered new forms of carbon called buckminsterfullerenes — or buckyballs — and sharing a Nobel prize for that work in 1996.

The old phrase "walking on eggshells" actually gives the honest egg a bad rap. Eggs are domes, and domes are among the strongest structures in the natural world. Joe Palca and intern Madeline Sofia demonstrate the strength of the egg in this video installment of "Joe's Big Idea." Watch and marvel as the eggs withstand a gallon of water, bowling balls and ... Joe himself? Take a look to learn about what gives frail eggshells their strength!

Artificial limbs have come a long way since the days of peg legs and hooks for hands. But one thing most of these prosthetics lack is a sense of touch.

Zhenan Bao intends to change that.

Artificial limbs have come a long way since the days of peg legs and hooks for hands. But one thing most of these prosthetics lack is a sense of touch.

Zhenan Bao intends to change that.

A new era for living in space may be about to start.

A prototype habitat is headed to the International Space Station for a two-year trial. What makes the module unique is it's launched folded up, and it's inflated to its full size once in orbit.

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