Ancient Earth blasted by asteroids
‘Between three and four billion years ago, changes in an asteroid belt between Mars and Jupiter hurled a devastating barrage of space rocks at our planet.
Astronomers are only now beginning to understand the scale of the bombardment – analysing the impacts from tiny ‘spherules’ preserved in rocks today.
Some of the asteroids were bigger than the 9-mile rock that wiped out the dinosaurs – but the 700-million-year barrage may have delivered chemicals crucial to the beginnings of life on our planet.’
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