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Close up of a spinning globe on black; Shutterstock ID 22230961; purchase_order: -; job: -; client: -; other: -

Does life require Earth鈥檚 rate of rotation to lie in a certain range?

Our readers offer their opinions on what would happen if Earth鈥檚 rotation slowed 鈥� and if it sped up. Life wouldn鈥檛 be easy for our planet鈥檚 inhabitants, let鈥檚 put it like that

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Spaceman walks on the red planet Mars. Space Mission. Astronaut travel in space; Shutterstock ID 532139260; purchase_order: -; job: -; client: -; other: -

Should we genetically modify humans we send to Mars? Part 2

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In late summer sunflower ripened on the farm field; Shutterstock ID 1883406451; purchase_order: -; job: -; client: -; other: -

This week鈥檚 new questions

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Tom Gauld: Do you have a spare minute, professor?

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Health

Why exercising outdoors is better for your health

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Twisteddoodles: science, but gossipy

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Fly Agaric (detail) ? Marshmallow Laser Feast

Life

Striking artworks reveal the beauty of mushrooms and other soil life

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2FWP497 Liquid iron molten metal pouring from ladle container into mold, industrial metallurgical factory, foundry cast, heavy industry background.

Could there be an advanced technological society without iron?

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Cosmonaut in a futuristic dystopian city . Sci fi and virtual reality concept . This is a 3d render illustration . ; Shutterstock ID 2230705453; purchase_order: -; job: -; client: -; other: -

What happens to our electronic cloud records when we die?

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BD5TB8 Alien and Older People, Cowes, Isle of Wight, England, UK, GB.

This week鈥檚 new questions

Could it be possible that another life form in the universe has a lifespan measured in many hundreds or thousands of our years? And could Homo sapiens have outcompeted Neanderthals in part due to a superior running ability?

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Comment

Jack the Ripper and the case of the missing DNA evidence

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Tom Gauld on how fast they grow up

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Twisteddoodles on a new super wash for lab coats

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Images that capture our timeless obsession with the moon

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