51动漫

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Brachiosaurus dinosaur in water next to islands with palm trees. This is a 3d render illustration; Shutterstock ID 2218581533; purchase_order: -; job: -; client: -; other: -

What is the earliest period in which I could survive on Earth? Part 2

Only a millennium or two ago, says one reader: think of all those viruses and bacteria around that you wouldn鈥檛 be used to

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It's raining heavily, wearing an umbrella during the rainy season

This week鈥檚 new questions

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Could two genetically modified mice come in handy on Valentine’s Day?

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Tom Gauld on a feeling of inferiority

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Twisteddoodles on a drug that gives workers that Friday feeling

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Workers with NASA???s Exploration Ground Systems (EGS) paint the bright red NASA ???worm??? logo on the side of an Artemis II solid rocket booster segment inside the Rotation, Processing and Surge Facility (RPSF) at Kennedy Space Center in Florida on Tuesday, Jan. 30, 2024. The EGS team used a laser projector to mask off the logo with tape, then painted the first coat of the iconic design. The booster segments will help propel the Space Launch System (SLS) rocket on the Artemis II mission to send four astronauts around the Moon as part of the agency???s effort to establish a long-term science and exploration presence at the Moon, and eventually Mars.

Space

NASA workers paint iconic logo onto Artemis II rocket boosters

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A young man lying on the grass and watching the Milky Way. Taken in A Veiga, Orense.

Mind

Could the ‘spirituality of science’ provide the perks of religion?

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Brachiosaurus dinosaur in water next to islands with palm trees. This is a 3d render illustration; Shutterstock ID 2218581533; purchase_order: -; job: -; client: -; other: -

What鈥檚 the earliest era on Earth in which I could comfortably survive?

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Watling Street, a Roman road in Great Britain, stretching to the horizon between green fields under a clear blue sky.; Shutterstock ID 666223486; purchase_order: -; job: -; client: -; other: -

How did the Romans know which way to go to build their straight roads?

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grass lawn with yellow daffodils in dutch garden 'Keukenhof', Holland; Shutterstock ID 172603808; purchase_order: -; job: -; client: -; other: -

This week鈥檚 new questions

Why are so many spring flowers yellow? And why can my dog bound up hills so easily compared with me? Does having four legs make climbing easier?

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Analysis of cats during a cat show reveals they mostly lazed around

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Tom Gauld on UFOs

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Twisteddoodles on group research

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Life

Painting a tree’s pruning wounds may be useful after all

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