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Part of the Guadiana river has dried up and gives way to dry land under the Puente de la Mesta medieval bridge in Villarta de los Montes, in the central-western Spanish region of Extremadura, on August 16, 2022. - Temperatures in Spain have been very high this summer with several unusual heat waves. Scientists say human-induced climate change is making extreme weather events including heatwaves and droughts more frequent and more intense. (Photo by THOMAS COEX / AFP) (Photo by THOMAS COEX/AFP via Getty Images)

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

Certain parts of the world have experienced severe drought this year, and our readers pinpoint where this 鈥渕issing water鈥� has gone

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An image of a human retina taken during an eye exam

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

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DRE532 Elephant (Loxodonta africana) waving its trunk sitting in the waterhole of Gwarrie Pan, Addo Elephant Park, South Africa

Why do humans have pubic hair? (Part 2)

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This week鈥檚 new questions

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Trip to the moon (lunar) concept - Long exposure night time rocket launch with solar eclipse "Elements of this image furnished by NASA" ; Shutterstock ID 1937796442; purchase_order: -; job: -; client: -; other: -

What happens if I shine a torch when moving at the speed of light?

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Mandatory Credit: Photo by Ryan Browne/Shutterstock (13048564cx) Eilish McColgan of Scotland celebrates victory in the Women's 10,000m final Commonwealth Games 2022, Day Seven, Birmingham, UK - 3 Aug 2022

Can the drag of hair tied in a pony tail slow down elite runners?

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This week鈥檚 new questions

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2GPFM5E Child in green jacket looking at rainbow over an ocean

Why do I see extra colours bands below the typical bow of a rainbow?

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Impressed young asian woman talking on phone with girlfriend while putting mascara in front of mirror at home, sharing rumors; Shutterstock ID 1793035801; purchase_order: -; job: -; client: -; other: -

Why do we open our mouths when we put on mascara?

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Portrait of white cat with crown on head sitting on bed, Namibia.

This week鈥檚 new questions

What has been the most successful animal ever? And why does pressing our fingers together in water increase the resistance in water, when the total surface area is the same?

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Could a word on ball of string be deciphered if the ball unravelled?

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Is jet lag worse if you travel east rather than west?

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What stops us from processing weeds into tasty and edible food? Part 2

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This week鈥檚 new questions

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