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Earth

Negatives saved from Shackleton’s Antarctic trip reveal hidden details

Frank Hurley rescued hundreds of photo negatives from the Endurance when it sank off Antarctica in 1915. Now a book of his surviving images casts new light on the fateful expedition

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D73X1R An colorful adult midnight snapper swims over the reef

How do fish recognise others of their own species?

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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

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H99WWH Low Angled portrait of a German Shorthaired Pointer dog.

This week’s new questions

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

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Tom Gauld on immersive bat research

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TwistedDoodles on science podcast demographics

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Tom Gauld: My confidence in my understanding of the scientific theory

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Twisteddoodles on mimicry in nature

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What sized planet would make space travel impossible due to gravity?

Our readers enjoy getting to grips with this one, pondering everything from what this planet might look like to the various methods its inhabitants might use to reach space

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Why is ice cream so delicious?

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What would the horizon look like on a disc-shaped planet? Part 4

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This week’s new questions

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

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