51动漫

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When is a bear’s face not a bear’s face? When it is a Mars bear

Feedback compares the smiling bear discernable in a NASA photo of the surface of Mars to seeing Jesus on a piece of toast, while also pondering the dangers of romance with someone who is "gross"

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What is the most efficient way to load passengers into an aircraft?

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Why are birds mostly monogamous, but not mammals?

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This week鈥檚 new questions

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Tom Gauld: Maths puzzles for conspiracy theorists

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Twisteddoodles on two distinct categories of video observations

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Mongolia - Uvurkhangai province - Portrait of Ganbaatar Davaasuren (?Bukhuu? ) riding one of his horses.

Humans

Stunning photos show nomadic life of Mongolian goat herders

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GLASTONBURY, ENGLAND - JUNE 20: A full moon rises behind Glastonbury Tor as people gather to celebrate the summer solstice on June 20, 2016 in Somerset, England. Tonight's strawberry moon, a name given to the full moon in June by Native Americans because it marks the beginning of strawberry picking season, last occurred on the solstice on June 22, 1967 and it will not happen again on the summer solstice for another 46 years until June 21, 2062. (Photo by Matt Cardy/Getty Images)

Space

How to identify moon craters and mountains on the lunar surface

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A man holds his lurcher dog as the canine excitedly licks and nuzzles with a woman who smiles and strokes the pet.

Is sweat from exercise different from that due to anxiety or illness?

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2J7J6G8 Berlin, Germany, May 09, 2022, German Chancellor Olaf Scholz and French President Emmanuel Macron attend a joint press conference at the chancellery in Berlin, Germany, May 09, 2022. This is Macrons first official visit after his re-election. The two leaders will discuss bilateral matters and Russia's ongoing war in Ukraine.(Photo by Omer Messinger)

Why do speakers at public events wave their hands around so much?

Our readers think that there reasons why public speakers use expansive gestures, from the way our brains are wired to avoiding looking like a robot and keeping the audience awake

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This week鈥檚 new questions

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Do you know where your carrots come from? Science can help if not

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Tom Gauld on the learning potential of artificial intelligence

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Twisteddoodles on why grapefruit interferes with medications

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