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RA5YK0 Dog jumping through a hoop held by a boy, Germany

Why do dogs usually follow instructions, but cats largely ignore them?

Woman in green swimsuit relaxing in outdoor jacuzzi with clean transparent turquoise water. Organic skin care in hot bath in luxury spa resort.; Shutterstock ID 648664720; purchase_order: -; job: -; client: -; other:

Why can鈥檛 we cool water as quickly as we can heat it? part 3

Baby turtle hatching in wildlife conservation area prior to release; Shutterstock ID 2691182297; purchase_order: -; job: -; client: -; other:

This week鈥檚 new questions

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The King’s Observatory could be yours for the low, low price of 拢18 million

Teamwork, emergency and doctors in a hospital for surgery together, working in theater to save a life. Medical, healthcare and a surgeon team in the operating room of a clinic for an operation; Shutterstock ID 2374428843; purchase_order: -; job: -; client: -; other:

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Why the world’s first spinal cord transplant is so controversial

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Are cats lazy or not? There’s some disagreement

KHG10X Ayers Rock, Uluru is reflected in the eye of a western tourist at sunset, Uluru-Kata Tjuta National Park, Northern Territory, Australia.

What’s the world actually like, if what we see is just our brain’s interpretations?

3C7H7N0 Illustration of Brachyspira pilosicoli bacteria. This spiral-shaped anaerobic bacterium causes intestinal spirochetosis and colonic inflammation in humans and animals.

How different would Earth be if聽anaerobic life were the only life聽form?

Is there also such a thing as an olfactory illusion? (part 4)

3FM8BME Red squirrel is smelling an red daisy

This week鈥檚 new questions

This photograph shows a charred forest with smoke rising in Deliblatska Pescara (Deliblato Sands), near the village of Grebenac, some 70 kilometres northeast of Belgrade on August 20, 2026, after a wildfire swept through the area. Firefighters were battling wildfires across the Balkans as days of high temperatures and drought conditions continue to drive blazes in several countries, including Serbia. Scientists have long warned that climate change caused by human use of fossil fuels will make periods of drought more intense and longer-lasting, creating the ideal conditions for wildfires. (Photo by Uros Arsic / AFP via Getty Images)

Environment

Some climate damage is now unavoidable even if we clean up our act

Twisteddoodles on a cat’s-eye view of science