Exploring the biggest questions of our time with the help of the world's greatest thinkers. Host Manoush Zomorodi inspires us to learn more about the world, our communities, and most importantly, ourselves.Get more brainy miscellany with TED Radio Hour+. Your subscription supports the show and unlocks a sponsor-free feed. Learn more at plus.npr.org/ted
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#645: How To Stop An Asteroid
Some smart people say we should be doing more to protect the Earth from asteroids. The technical issues are relatively easy. The economics — figuring out who's going to pay — are much harder.