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On whether tiny ancient Egyptian hand prints were made by reptiles

Feedback ponders a study of stencilled outlines of hands found on rocks in south-west Egypt and their owners, while also digging into the possibly misplaced assumption that accounting is boring

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2F5E18C Hand Knuckle Finger Joint Crack. Fingers Snap

Why do our knuckles make a popping sound when cracked?

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mist, rain

How fast would you have to travel to be able to run on water?

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CX3N1D three 3 old men friends talking arguing discuss

This week’s new questions

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Tom Gauld on a timely operation

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Twisteddoodles on filling the space available

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Researchers at SLAC National Accelerator Laboratory are nearly done with the LSST Camera, the world's largest digital camera ever built for astronomy. Roughly the size of a small car and weighing in at three tons, the camera features a five-foot wide front lens and a 3,200 megapixel sensor that will be cooled to -100??C to reduce noise. Once complete and in place atop the Vera C. Rubin Observatory's Simonyi Survey Telescope in Chile, the camera will survey the southern night sky for a decade, creating a trove of data that scientists will pore over to better understand some of the universe's biggest mysteries, including the nature of dark energy and dark matter. (Jacqueline Ramseyer Orrell/SLAC National Accelerator Laboratory)

Technology

Astronomers have unveiled the world’s largest digital camera

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Diet and Healthy food of Delicious Baked sweet potato, Famous snack at Japan on Autumn and Winter season.; Shutterstock ID 1668197044; purchase_order: -; job: -; client: -; other: -

Humans

How to make a sweet potato even sweeter: freeze it before baking

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Studying the ‘nits of louse’ on a holy relic

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Large group of people on the move, some shopping, some holding hands, others just walking along.

What is the age/location/appearance of the world’s average person?

Beware of applying averages to people, say our readers who point to Earth’s core and 1940s mannequins in their responses

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How can stars be 30 billion light years away?

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This week’s new questions

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Tom Gauld on the arrival of the new and improved version 2.0

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Twisteddoodles on graphs gone bad

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