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Last Word

person aged group doing water aerobics in a swimming pool during a spa treatment; Shutterstock ID 167286806; purchase_order: -; job: -; client: -; other: -

In water sports, should fingers be pressed together to increase drag?

Although the total surface area of a hand is the same with fingers open or closed, the gaps between our fingers can make a surprising difference, say our readers

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B70G62 Suriname, Brownsweg, Brownsberg National Park. Woman looking at Tarantula , Avicularia Metallica.

This week’s new questions

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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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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?

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illustrating the accelerating expansion of the universe

How can stars be 30 billion light years away?

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Milk coffee is a combination of equal parts espresso, steamed milk and milk froth.

This week’s new questions

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P4ECNR Colorful soda drinks macro shot

Do drinks really taste different from cans or plastic/glass bottles?

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CEKXK0 A selection of QR (Quick Response) smartphone codes taken from British newspapers and magazines in late 2011, early 2012.

Are there limitless permutations of QR codes, or are they recycled?

Don’t worry about running out of QR codes any time soon, say our readers

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Why is pain so painful? (continued)

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This week’s new questions: Loose screws and brain overload

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Where is the water that Europe and China are missing this year?

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What happens to a photon after it hits the retina of my eye?

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