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Physics

The laws of physics were broken in 2023 - by sperm

�鶹��ý's most popular story of the year was about the discovery that sperm break Isaac Newton's third law of motion

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Escherichia coli

Life

Life may be less chaotic than we thought, say physicists

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This illustration shows NASA's Cassini spacecraft diving through the plume of Saturn's moon Enceladus, in 2015

Space

Cyanide in the ocean of Saturn's moon Enceladus could be good for life

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Space

Mercury has salt glaciers that could provide the conditions for life

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The UFO shines on a male standing on the mountain; Shutterstock ID 1476587882; purchase_order: -; job: -; client: -; other: -

Space

Our hunt for alien life needs solid guidelines for clear-cut success

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FG10H1 JUPITER: EUROPA, 1979. /nJupiter's moon, Europa. Photographed by Voyager 2, 1979.

Space

How excited should we be by signs of life spotted on alien worlds?

Features

Hair seems to help shrimp move through water

Life

Hairy legs make you swim better – if you're a shrimp

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Ice might be ubiquitous, but we are still discovering things about it

Earth

Ice might be ubiquitous, but we are still discovering things about it

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Space

Comets may bring ingredients for life most easily to clustered planets

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An illustration of the early surface of Earth with a volcano erupting in the background.

Life

How we will discover the mysterious origins of life once and for all

Seventy years ago, three discoveries propelled our understanding of how life on Earth began. But has the biggest clue to life's origins been staring biologists in the face all along?

Features

Environment

Extensive melting of West Antarctic ice sheet now looks unavoidable

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Life

Do animals know that sex leads to babies?

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Environment

Sea level rise is already leading to longer commutes in coastal US

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Earth

Nearly all mammals will go extinct in 250 million years as Earth warms

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