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HUD Matrix particles grid. Virtual reality. Grid core. Magic explosion star with particles. Acceleration race. Glow lines. Colorful flash. Big bang. Light trails. Glitch effect. Deep space.; Shutterstock ID 1590869041; purchase_order: -; job: -; client: -; other: -

Did abstract mathematics exist before the big bang? Part 2

Our readers continue to grapple with this one, with one seeing maths as a human invention, and another describing it as eternal

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Group of Asian friends having fun enjoying beach camping in summer

This week鈥檚 new questions

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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?

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

This week鈥檚 new questions

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Food tin cans. Groceries background with dof.; Shutterstock ID 169474457; purchase_order: -; job: -; client: -; other: -

In a post-apocalyptic world, how long would canned food remain edible?

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This is a 3D illustration of Three Merging Supermassive Black Holes.

Do black holes look the same from any angle?

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Handsome young man sleeping in the bed at night in his bedroom. Snoring and having breathing problems.

This week鈥檚 new questions

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Why does the return journey seem much shorter than the outward leg?

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A8R854 House Mouse Mus musculus scurrying across garden lawn Kent UK

Can a trapped mouse really find its way back from a mile away?

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2HCTCGW grumpy cat sits on a newspaper stack

This week鈥檚 new questions

Why do cats like to sit on newspapers and magazines? And if an athlete consumed flatulence-inducing food, could the resulting emissions provide enough jet propulsion to enable victory rather than coming second?

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What is the best option to save energy when cycling on hilly roads?

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Where is 180 million years鈥� worth of dinosaur poo?

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This week鈥檚 new questions

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What would happen if time stopped?

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