This week鈥檚 new questions
If time started at the big bang, is it ever likely to come to a halt? And why do almost all vertebrates have tails, even when they don鈥檛 seem useful, but not apes or frogs?
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If time started at the big bang, is it ever likely to come to a halt? And why do almost all vertebrates have tails, even when they don鈥檛 seem useful, but not apes or frogs?
Ants and honeybees learn views, so they can sometimes find their way home from a good distance, say our readers