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  • A major puzzle for which nobody has an answer is this: is there some size at which the planets change their nature from water-rich planets like Neptune, to rocky planets like the Earth? We have found two planets that are the size of the Earth in radius, but they are very close to their host star, so water on the surface would evaporate away.

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A major puzzle for which nobody has an answer is this: is there some size at which the planets change their nature from water-rich planets like Neptune, to rocky planets like the Earth? We have found two planets that are the size of the Earth in radius, but they are very close to their host star, so water on the surface would evaporate away.

I'm at a funny crossroads, personally. I really want to turn my attention away from planet-hunting towards Search for Extra-Terrestrial Intelligence (SETI) program at UC-Berkeley. I'm in this lucky position that my career has been more successful than I could have ever imagined. It's time for me to roll the dice, try something that's a long shot. Younger scientists can't put their eggs in that basket, because if you spend your time on SETI, your chances of success are low. But I have the luxury. There are some experiments we can do to hunt for the great galactic Internet.
Рow can we be, even if it is the last day on earth? It's like Christmas Eve. "Okay, it's going to be Christmas. So what. What are you going to do? Jump off the Empire State Building?" It's all still the same. The last day of your life is still going to be a day. Then there's that thing, maybe it's not true. Who knows? Are you going to believe it? Are you going to buy it? There are a lot of other things that are important, you know. You know what they say. Life is what happens when you're doing other things, right?

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