快猫短视频

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Why is it easier to copy a picture of an object than the real object?

If I鈥檓 looking at a picture of an apple or the apple itself, wouldn鈥檛 the image on my retina be the same? So why is copying easier than drawing from real life? Readers respond

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What鈥檚 the minimum population needed to sustain a comfortable life?

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

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This week鈥檚 new questions

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Life

Animal sounds hold clues to biodiversity 鈥� help scientists unlock them

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The peculiar case of asking Alexa for the mass of a neutrino

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Space

How to find the constellations of Leo and Virgo in the night sky

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快猫短视频s finally find life on Mars (or actually they haven鈥檛)

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Life

Stark images of Amazon show incredible peaks and Indigenous peoples

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Why hasn鈥檛 time been decimalised?

Decimal time was used in ancient China, and may one day be used on Mars. But we can thank the Babylonians and Egyptians for our base 12 and base 60 time-keeping

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This week鈥檚 new questions

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Tom Gauld has a good felling about this experiment

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Twisteddoodles: ‘My experiment has generated huge amounts of raw data’

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I lost 15 kilograms, so why can鈥檛 I comfortably carry the same weight?

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