Astrobiologist David Grinspoon discusses how humans are changing Earth today, and what that might mean in the hunt for alien life.Space.com: That goes back to geoengineering. I love that you count asteroid deflection and planetary protection as part of geoengineering; it's not something I've really considered. It's also interesting that you describe us as already geoengineering the planet negatively.Grinspoon: And positively. When we do reforestation, fix the ozone, these are kinds of geoengineering. Even when we have the Paris Climate Agreement and decide we're going to reduce our emissions collectively, we are going to shoot for that target, that's a kind of geoengineering.
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Born in Long Island public school year in Sweden as exchange student, went to Harvard one year, Cooper Union in NYC as Art student. Have two children, one of whom is rock mogul, the other has three daughters, one of whom has two daughters, making me (more...