Â鶹´«Ã½

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2T7WK87 Hooper, Colorado, USA - July 21, 2023: An alien welcomes visitors to the UFO Watchtower, a unique roadside attraction in the San Luis Valley.

Could an advanced civilisation develop without the wheel?

Our readers are split on this one - some point out that any advanced civilisation would surely stumble upon the wheel, while others believe the lack of a wheel could be beneficial in surprising ways

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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

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Group of Asian friends having fun enjoying beach camping in summer

This week’s new questions

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Â鶹´«Ã½ Live 2024

All the action from Â鶹´«Ã½ Live – in photographs

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Tom Gauld: How my day is going

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Twisteddoodles: ‘The magic mirror will show your heart’s true desire’

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2T6AF4B the planet Saturn photographed with an amateur telescope

Space

Now is a great time to see Saturn in all its ringed glory

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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’s new questions

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Are dog people more resilient than cat people? Apparently so

Feedback uncovers new research into the difference in personality between pet owners, and discovers an apparent strength of spirit in those who plump for canines

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Life

See the stunning winners from the Wildlife Photographer of the Year

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Tom Gauld: Remember this day when my genius blazes across the world

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Twisteddoodles brings that seasonal feeling to the lab

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Space

A dramatic return from space in Kazakhstan

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