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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

Why did green fur never evolve among mammals, when there are birds with green plumage and reptiles with green skin? And frequently when I look for ice cubes for an evening gin and tonic, I find they have shattered in the mould. What causes this?

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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?

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Back view of 9 year old girl hiking, walking alone in the forest by the river with a backpack in early spring. Beautiful idyllic nature.; Shutterstock ID 2302035971; purchase_order: -; job: -; client: -; other: -

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

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R1D8PY Silverback western lowland gorilla sitting down to eat at Zoo Atlanta in Atlanta, Georgia. (USA)

This week鈥檚 new questions

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Supernova explosion in the center of galaxy "Elements of this image furnished by NASA "; Shutterstock ID 1838493049; purchase_order: -; job: -; client: -; other: -

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

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HYMJ79 The famous prehistoric stone circle at Stonehenge on a bright spring day.

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

Trial and error, says one reader, who has turned his own home into a giant calendar

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Why can a fly enter my home easily, but not escape as easily? Part 2

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This week鈥檚 new questions

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

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Is it more efficient to leave the fridge open if pouring milk for tea?

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