Smart Planet videos of the week: How to protect Earth from an asteroid strike

Former astronaut and physicist Ed Lu discusses the need to develop an early-warning and precision tracking/guidance system to prevent asteroids from hitting the planet.

Here's the week in Smart Planet video.

At TEDxNASA in San Francisco, former astronaut and physicist Ed Lu discusses the need to develop an early-warning and precision tracking/guidance system to prevent asteroids from hitting the planet.

Also at TEDxNASA, Bilal Bomani, a senior scientist with NASA's biofuels program, discusses the space agency's study of algae and halophytes as the next generation of aviation fuel.

And kids learn mobile app creation at summer camp.

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