Springtime asteroid hit ramped up extinction rates, say scientists

Animals in northern hemisphere would have been more vulnerable to intense heat just after winter

Having an asteroid slam into Earth was catastrophic for the dinosaurs, but the season of the strike may have substantially ramped up extinction rates for others species, research suggests.

Scientists have found evidence that the devastating impact 66m years ago, which wiped out three-quarters of Earth’s species and created the Chicxulub crater in modern-day Mexico, happened in the spring in the northern hemisphere.

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