91色情片

Last Word

How do animals recognise their young and do they know they reproduce?

Male lions kill the cubs of other males, but not their own, yet cuckoos get away with other species raising their chicks. How? Insight comes from the behaviour of albatrosses, orphan lambs and goslings

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This week鈥檚 new questions

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When I can鈥檛 remember something, how do I know that I once knew it?

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Do I create gravitational waves when I crash onto the sofa?

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Why do some people like gambling so much? (continued)

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This week鈥檚 new questions

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Why do we hear two musical notes, an octave apart, as the ‘same’ note?

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Is there any harm in drinking too much tea?

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This week鈥檚 new questions

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Should we genetically engineer cats to stop their urge to kill?

If it were possible to tinker with the genome of domestic cats to reduce their urge to hunt wildlife, would this be desirable? One cat writes in with an interesting suggestion

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If there are other universes, would our universe feel their gravity?

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Why do wet dogs like to shake themselves dry beside people? (continued)

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This week鈥檚 new questions

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How far can you go before the sun no longer appears the shiniest star?

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