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D73X1R An colorful adult midnight snapper swims over the reef

How do fish recognise others of their own species?

Two scientists use a massive, illuminated periodic table of elements as they discuss the element holmium in the Lawrence Hall of Science at the University of California, Berkeley. (Photo by ?? Ted Streshinsky/CORBIS/Corbis via Getty Images)

How many known elements could we delete without ill effect? Part 2

H99WWH Low Angled portrait of a German Shorthaired Pointer dog.

This week鈥檚 new questions

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Can you guess the origin of 7 tiny species on a fictional archipelago?

Spectators shield themselves from the heat with a leaflet ahead of the 2026 World Cup football tournament round of 16 match between Paraguay and France at Philadelphia Stadium in Philadelphia on July 4, 2026. (Photo by MAURO PIMENTEL / AFP via Getty Images)

Environment

It is vital we understand heat and humidity’s differing effects on us

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A surprisingly detailed look at the physics of a lugworm’s poop

Life

Synthetic biology may finally be ready to solve life’s biggest mystery

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Do you want your underwear with added probiotics?

A person shields their face from the heat of the sun with a fan, in central London on June 25, 2026, during a heatwave. The UK recorded its hottest ever June temperature on June 24 with the mercury rising to 36.1C in southern England, breaking the previous record of 35.6C set in 1976. (Photo by Brook Mitchell / AFP via Getty Images)

Environment

Can climate change stay in the news agenda after Europe’s heatwave?

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Hold the onions 鈥� and see if they make you cry

Human brain. Digitally enhanced 3D magnetic resonance imaging (MRI) scan of a normal human brain. An eyeball is shown at lower left (blue).

Mind

Neuroscience can’t tell us the way to govern people’s brains

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The bigger the lizard, the bigger the Wiki page, discovers ecologist