If we are ever contacted by aliens, the man I'm having lunch with will be one of the first humans to know. His name is Paul Davies and he's chair of the Seti (Search For Extraterrestrial Intelligence) Post-Detection Task Group. They're a group of the world's most eminent scientists and will be, come the big day, the planet's alien welcome committee. His is an awesome responsibility, and one he doesn't take lightly.

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