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

How long will it be before the rules for leap years need revision?

Earth鈥檚 slowing rotation will change the length of its days, agree our readers, who disagree on how soon this will affect our leap years, but in accord on the fact it will be at some distant-future time

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Walking highland cattle on sunset, scottish cow; Shutterstock ID 2496920209; purchase_order: -; job: -; client: -; other: -

This week鈥檚 new questions

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Volcano Karymsky explosion on Kamchatka; Shutterstock ID 1990974674; purchase_order: -; job: -; client: -; other: -

Could a huge, prolonged volcanic eruption happen again?

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2H6020J Few pedestrians on the rather busy street in metaverse conceptual reality

Is there evidence disproving that we are part of a simulation? Part 2

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A young child has both his thumbs on middle C. There are stickers on each key to guide him through the octaves and notes.

This week鈥檚 new questions

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H2HW3X Multiple universes in the infinite space

Could there be smaller universes in the particles we know of?

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Group of Asian friends having fun enjoying beach camping in summer

Is music an essential part of human evolution?

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E8YY3W Jackdaw (Corvus monedula) with a bramble stick approaching its nest hole in a recently pollarded willow trunk, Gloucestershire.

This week鈥檚 new questions

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Network of mesh lines forming brains of different sizes in dark background with red and yellow glowing particles. 3D illustration of the concept of artificial intelligence, ideas and creativity; Shutterstock ID 2417477169; purchase_order: -; job: -; client: -; other: -

If human brains could be made larger, how much smarter could we be?

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A radar-equipped speed camera monitors the traffic on a road, flashing a yellow light when it catches a car exceeding the speed limit, and using technology to identify the vehicle and enforce the law.; Shutterstock ID 2392738707; purchase_order: -; job: -; client: -; other: -

How fast am I moving and in which direction? Part 2

Our readers have more answers to this thorny question, even calling on Monty Python for help

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This week鈥檚 new questions

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What would happen if a rogue planet passed through our solar system?

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Why do cats like to sit on newspapers and magazines?

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This week鈥檚 new questions

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