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Artwork of the young Earth-Moon system. The Earth had recently formed when it was struck by a protoplanet called Theia roughly three times the size of Mars. Debris from the impact went into orbit, while the cores of the two planets merged. Within weeks of the event, the debris formed a Saturn-like ring around the Earth. Later collisions in this ring led to the formation of the Moon, probably within just a few thousand years. Initially the Earth and Moon were much closer together than they are now, and spinning more quickly.

Space

Moon mystery could be solved by simulation of planetary smash-up

The moon is thought to have been created in a violent collision, and a new simulation of the event could answer questions that have puzzled astrophysicists

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A person cycles in Reykjavik, Iceland, on 3 September 2020

Health

Iceland targets herd immunity with controversial covid-19 strategy

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The meteorite as seen by the drone

Technology

Drones and AI help find pebble-sized meteorite that landed in 2021

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toad

Life

Common toads surprise biologists by climbing trees

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Environment

Fix the Planet newsletter: Carbon capture power stations are back

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TOPSHOT - Residents evacuate the city of Irpin, north of Kyiv, on March 10, 2022. - Russian forces on March 10, 2022 rolled their armoured vehicles up to the northeastern edge of Kyiv, edging closer in their attempts to encircle the Ukrainian capital. Kyiv's northwest suburbs such as Irpin and Bucha have been enduring shellfire and bombardments for more than a week, prompting a mass evacuation effort. (Photo by Aris Messinis / AFP) (Photo by ARIS MESSINIS/AFP via Getty Images)

Technology

Why hasn’t Russia waged an all-out cyberwar against Ukraine?

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Martian surface

Space

Curiosity rover discovers diverse cache of organic minerals on Mars

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Facial Recognition System

Technology

Simple mathematical trick could slash AI development time in half

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Red blood cells in a blood vessel, computer artwork.

Health

We may now know why young blood can have rejuvenating effects

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Aerial view of Lake Hillier, Middle Island near Esperance

Earth

Red and purple microbes give Australia鈥檚 mysterious pink lake its hue

DNA sequencing has revealed that a bright pink lake on an island off Western Australia gets its colour from a mix of salt-loving bacteria and algae

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Health

Vaping probably isn鈥檛 a gateway to smoking

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Health

Recurring UTIs may be prevented with an antiseptic drug

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Health

Hugging a pillow that mimics breathing could reduce anxiety

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Health

Electric field keeps kidney cells powered up while organs are on ice

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