Simon Ratcliffe: What radio astronomy can tell us now and in the future
Simon Ratcliffe, the Barefoot Astronomer, thinks we might be able to find signs of life through radio satellite and is proposing a project to build, in 50 years, 3000 antennas on South African land. [Note: We want you to see these talks exactly as they happened! The archive footage might be a little rougher than the usual TED.com talk.]
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