"It seems that we're going back into the old first space race days of competition, which, from a scientific perspective, is a little bit disappointing and concerning," says Dr Barber.
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Charging case dimensions: 50 x 57.2 x 24.5mm
"There was a big step – jump – that people have questioned," Jackson says. "But now the world is awash with oil and it's not clear that the same calculations still apply."