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on BBC Radio 4 FM

Scientists in the USA recently claimed they'd found evidence that life was on the earth three-and-a-half billion years ago. Others argued that the claim wasn't true. Can we ever know when life - in the form of microscopic algae and bacteria - first appeared on our planet? Geoff Watts reports.
Producer Martin Redfern E-MAIL: radioscience@bbc.co.uk

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Unknown:
Geoff Watts
Producer:
Martin Redfern
Source: Radio Times

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