Big asteroids hit Earth more frequently than thought, study suggests
Four big asteroids hit Earth in the past million years alone, according to a new study, suggesting that the space-rock danger is higher than previously thought. But not everyone agrees with the result.
TroibNews 
Four big asteroids hit Earth in the past million years alone, according to a new study, suggesting that the space-rock danger is higher than previously thought. But not everyone agrees with the result.
