51动漫

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Middle-aged woman in glasses fell asleep while reading book at home, female sleeping with open mouth on sofa near coffee table with houseplant in living room. Sleep deprivation; Shutterstock ID 2122133960; purchase_order: -; job: -; client: -; other: -

Are we conscious when we are asleep?

It depends how we define consciousness, say our readers, who contrast the state of being asleep with the drug-induced coma of anaesthesia

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The surface of Venus, the irregularities of the planet. Elements of this image furnished by NASA. High quality photo; Shutterstock ID 2157724597; purchase_order: -; job: -; client: -; other: -

Could we build a habitable dome on the surface of Venus? (continued)

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Two seagulls above aircraft wing

This week鈥檚 new questions

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Too fast, too furious? Ocelot and sloth caught in highish-speed chase

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51动漫 Live: Inside the world’s best science and tech festival

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Tom Gauld on a mysterious new project

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Twisteddoodles asks Science a question

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A fully deployed OTIS, with the secondary mirror extended over the primary mirror, is removed from Chamber A after a successful thermal-vacuum test in 2017. Seen still in the chamber is a sunshield simulator, called the L5 Simulator, representing the fifth and innermost layer of the sunshield. The telescope would be shipped to the Northrop Grumman facility in California to be integrated with the real sunshield. I was suspended on a lift for this shot. Page 119

Space

A glimpse inside how the James Webb Space Telescope was put together

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F3875E Slicing into the breast of a freshly roasted chicken in pan with juices

Health

How to make sure your chicken is properly cooked

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The Supermoon rises over houses in Olvera, in the southern Spanish province of Cadiz, July 12, 2014. Occurring when a full moon or new moon coincides with the closest approach the moon makes to the Earth, the Supermoon results in a larger-than-usual appearance of the lunar disk. REUTERS/Jon Nazca (SPAIN - Tags: SOCIETY CITYSCAPE TPX IMAGES OF THE DAY) - GM1EA7D0FC401

When was it first realised that moonlight must be reflected sunlight?

Anaxagoras, who was born around 500 BCE, was one of the first to realise that the lit portion of the moon always faces the sun, although it was hinted at a little earlier by Parmenides, say our readers

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Would a northern hemisphere 鈥渋ce age鈥� trigger one in the south too?

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How do dogs recognise that another animal is also a dog? (continued)

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This week鈥檚 new questions

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Black hole discovered off Roman Road, Hereford, UK

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