51动漫

Last Word

Golden lion tamarin; Shutterstock ID 121264012; purchase_order: -; job: -; client: -; other: -

Why aren鈥檛 humans covered in hair like other primates are? Part 3

Readers clash over whether it was speed or persistence that enabled humans to hunt their prey down on the savannah, even citing David Attenborough to back up their arguments

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Astronaut ascends a lunar hill against a backdrop of brilliant cosmic clouds and starry sky. 3d render; Shutterstock ID 2441449595; purchase_order: -; job: -; client: -; other: -

This week鈥檚 new questions

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2G8TR2M Young woman sitting and holding a blue mug of tea outdoor

Will my tea cool more quickly if my hands are cupped around the mug?

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Close up of woman's eye

Why do victims of violent attacks sometimes take no immediate action?

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Blue-naped parrot, Tanygnathus lucionensis, colorful parrot, native to Philippines. Green parrot with red beak and light blue rear crown sitting on twig isolated against dark green jungle background.; Shutterstock ID 1911703984; purchase_order: -; job: -; client: -; other: -

This week鈥檚 new questions

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Crane picking up a car in a junkyard; Shutterstock ID 36444292; purchase_order: -; job: -; client: -; other: -

Is it greener to keep my petrol car or scrap it for an electric one?

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2HK7YDT man placing a T-shirt on the ironing board

Why is it harder to remove a shirt crease with an iron than put it in?

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HFRCEK Knife slicing wholegrain bread

What is the best way to minimise crumbs when slicing bread? Part 2

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Man looks to a huge brain. Mental capacity, cognitive processing, and human interaction. This is a 3d render illustration; Shutterstock ID 2341475275; purchase_order: -; job: -; client: -; other: -

This week鈥檚 new questions

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Blue and dark space landscape with planets and starry sky and mountains. Huge planet on the horizon volumetric lighting 3d rendered baackground.; Shutterstock ID 2208373835; purchase_order: -; job: -; client: -; other: -

Would you see further from a mountain on a large or a small planet?

It will depend on the local topography, say our readers - but the most expansive view in the solar system will be from the top of Mars鈥檚 Olympus Mons

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At what age would a child be capable of surviving in the wild? Part 2

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This week鈥檚 new questions

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How would Earth be affected if Sirius were to go supernova?

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How did ancient Britons mark the solstices with Stonehenge? Part 2

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