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MRI scans of a healthy brain (left) and a brain with amyloid plaque deposits (right), a sign of Alzhiemer's disease

Health

2023 saw a cautious hope for Alzheimer's treatment but doubts remain

The US approved lecanemab to slow cognitive decline among people with early Alzheimer's, but not everyone is convinced the drug has that big of an impact – not to mention concerns over its safety and practicality

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Life

The best animal photos of 2023, from hyenas to southern stingrays

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Environment

The best photos of the natural world in 2023

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Space

The biggest science news stories of 2023 as chosen by 91av

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2RFE6YH LK-99 room-temperature revolutionary superconductor. High quality photo

Physics

LK-99 superconductor mania swept the internet for a few weeks in 2023

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2NK6HH7 CHINESE SPY BALLOON seen from a US Air Force U-2 above America. Photo: USAF

Technology

The spy balloon saga of 2023 inflated US-China political tensions

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Close up image of a selection of freshly flame grilled burgers in a row on a wooden counter at a London street food market. Each of the burgers has its own label, on which is written the contents of the burger. The burgers are sandwiched between glazed buns, and presented on beds of fresh green lettuce and stuffed with melted cheese and red onion. Horizontal colour image with copy space and beautiful bokeh background.

Health

Cancer in young people is rising and 2023 saw a plan to figure out why

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2PNBXXP Pack of Ozempic, antidiabetic for weight control, taken in a pharmacy in Niesky, April 13, 2023.

Health

Wegovy and Ozempic made 2023 a revolutionary year for weight loss

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NEW DELHI, INDIA - AUGUST 23: People celebrates after successful landing of Chandrayaan 3 on Moon at Nehru Planetarium on August 23, 2023 in New Delhi, India. The Chandrayaan-3 lander module has successfully touched down on the Moon's south pole, making India the first nation in the world to achieve this feat. India is also the fourth nation, after the United States, China and Russia to have landed on the Moon. (Photo by Sanchit Khanna/Hindustan Times via Getty Images)

Space

India made history with 2023's low-budget Chandrayaan-3 moon landing

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2RF6WE0 FOTOMONTAGE, Miniatur-Roboter auf einer Computerplatine mit dem Schriftzug ChatGPT

Technology

2023 was the year that artificial intelligence went mainstream

From ChatGPT to Gemini, this year was dominated by large language models and other AIs becoming everyday tools used by millions of people

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Mathematics

Mathematicians discovered the ultimate bathroom tile in 2023

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Health

Covid-19 'emergency' ended in 2023 but the virus still lingers

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Environment

Why 2023 was almost certainly the hottest year ever recorded

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Space

Six of the most amazing space pictures from 2023

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