Europe
Asia
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Yes. On cosmic timescales, comets hit Earth frequently, but
Amazing answers to your curious questions
Speak your mind
Might our universe – as vast as it is – be simply one of many? We look at the growing evidence that there’s more than one cosmos out there
While our planet only has one easily visible Moon, several other tiny objects arguably deserve the title too
GLOBAL EYE
Birds can transport us to another time and place entirely,