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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?

Our readers clash over this one, with some advocating keeping a petrol car, given the age of the questioner, some who are all for switching to an electric car - and some singing the praises of mass transit instead

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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’s new questions

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Solving the mystery death of a Danish black-headed gull

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Tom Gauld: When zoologists go bad

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Twisteddoodles takes on vaping

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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’s new questions

If visitors to our planet in millions of years found fossils of Homo Sapiens and another great ape in an elaborate tomb, would they be able to prove which one built it? And how did marine reptiles like ichthyosaurs breathe?

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Mathematics

The Monty Hall problem shows how tricky judging the odds can be

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Life

The dangers of amorous ostriches when starting an ostrich farm

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Life

An amazing great bustard gets ready for a new nature exhibition

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Tom Gauld on a graphical downturn

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