杏吧原创

Last Word

Battle cruiser approaching light speed in an outer space wormhole, 3d digitally rendered illustration; Shutterstock ID 91289105; purchase_order: -; job: -; client: -; other: -

How long would it take to speed up to 99 per cent light speed? Part 2

More readers imagine how to bring humans to near-light speed while still riding in comfort

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2CCYRY3 Please Do Not Feed The Horses

This week鈥檚 new questions

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Hand of male holding soil in the hands for planting. Expert hand of farmer checking soil health before growth a seed of vegetable or plant seedling. Gardening technical, Agriculture concept.; Shutterstock ID 2252590625; purchase_order: -; job: -; client: -; other: -

How can I ensure that most of my body is used after my death?

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P2H56B Weasel standing upright, Mustela nivalis, Germany

Why do many animals have white underbellies? Part 2

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Male nose close up bottom view - hair in the nostrils; Shutterstock ID 1895123341; purchase_order: -; job: -; client: -; other: -

I see why we have two eyes and two ears 鈥� but why two nostrils? Part 2

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Piles of old tyres in a garage. Romania

This week鈥檚 new questions

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rainy days rain drops on the window surface ; Shutterstock ID 724215220; purchase_order: -; job: -; client: -; other: -

Why does water never move in straight lines?

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Male nose close up bottom view - hair in the nostrils; Shutterstock ID 1895123341; purchase_order: -; job: -; client: -; other: -

I understand why we have two eyes and two ears 鈥� but why two nostrils?

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an australopithecus, one of our ancestors; Shutterstock ID 790742188; purchase_order: -; job: -; client: -; other: -

When did humans first start to sing? Part 2

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JAPAN. Tokyo. Bank near Tokyo Station. 2002.

This week鈥檚 new questions

How much money is gained or lost in computer rounding errors every year? And could burning all the white hydrogen available for power deplete our air supply?

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How long would it take to accelerate to 99 per cent light speed?

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Is it known when humans or our ancestors first started to sing?

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This week鈥檚 new questions

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Why do many animals have white undersides?

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