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Close-up view of the two bright galactic nuclei, each housing a supermassive black hole, in NGC 7727, a galaxy located 89 million light-years away from Earth in the constellation Aquarius. Each nucleus consists of a dense group of stars with a supermassive black hole at its centre. The two black holes are on a collision course and form the closest pair of supermassive black holes found to date. It is also the pair with the smallest separation between two supermassive black holes ??? observed just 1600 light-years apart in the sky.???? The image was taken with the MUSE instrument on ESO???s Very Large Telescope (VLT) at the Paranal Observatory in Chile.

Space

A pair of nearby supermassive black holes are heading for a collision

Two supermassive black holes have been discovered just 1600 light years apart, and they are likely to collide in about 250 million years

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A hot planet transits in front of its parent star in this artist impression of an exoplanet system.

Space

An ultra-hot gas giant exoplanet orbits its star once every 16 hours

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A C-shaped xenobot pushes along a cell to create a new clump of cells

Life

Living robots made from frog cells can replicate themselves in a dish

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An Ardipethecus ramidus skull found in Awash, Ethiopia

Humans

Canine teeth shrank in human ancestors at least 4.5 million years ago

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Planet Earth and Sun. Elements of this image furnished by NASA.

Earth

Mysterious origin of Earth’s water may be explained by solar wind

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Uranium, a chemical element with a U symbol and an atomic mass equal to 238 u, has an atomic number 92

Technology

Material inspired by blood vessels can extract uranium from seawater

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Mosquito sits on human

Health

A single vaccine could protect against many mosquito-borne diseases

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Wooden box filled with fresh vine ripened heirloom tomatoes

Environment

Heirloom tomatoes are less genetically diverse than standard varieties

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Colonies of MRSA bacteria on blood agar plate

Health

NHS England to test Netflix-style subscriptions for antibiotics

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Activists protest solitary confinement in New York

Health

One in 10 US Black men put in solitary confinement before turning 32

An alarming number of Black men in the US are imprisoned in 鈥渢he hole鈥� for over 15 days, which is defined as torture by the UN and can lead to PTSD and suicide

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Health

Omicron: How dangerous is the new variant first found in South Africa?

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Space

Merging black holes may create bubbles that could swallow the universe

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Technology

Our global agreement on AI could reduce bias and surveillance

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Environment

Megafauna extinctions led to more grassland fires worldwide

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