SCIENCE

Global treaty is failing to curb ultra-potent HFC-23 greenhouse gas emissions

Air-conditioning units, which often use HFC gases, on a building in Shenyang, China Visual China Group via Getty Images Emissions

SCIENCE

AI chatbots fail to diagnose patients by talking with them

Don’t call your favourite AI “doctor” just yet Just_Super/Getty Images Advanced artificial intelligence models score well on professional medical exams

SCIENCE

Ancient checked dress may be Europe’s oldest two-colour garment

  A reconstruction of the dress from an Iron Age grave in the Netherlands, created by Prehistorisch Dorp in Eindhoven

SCIENCE

Supersonic flight will see a dramatic return in 2025 with new aircraft

Boom Supersonic’s XB-1 taking off for a test flight Boom Supersonic Commercial supersonic aircraft may soon return for the first

SCIENCE

Newly identified scorpion species ‘spits’ venom to defend itself

This scorpion (Tityus achilles) can spray venom out of its stinger Léo Laborieux A Colombian scorpion that is new to

SCIENCE

OpenAI’s o3 model aced a test of AI reasoning – but it’s still not AGI

OpenAI announced a breakthrough achievement for its new o3 AI model Rokas Tenys / Alamy OpenAI’s new o3 artificial intelligence

SCIENCE

‘Artificial tongue’ can detect chemical makeup of alcoholic drinks

Molecular testing can be used to assess drink quality Evgenii Parilov/Alamy Drinks manufacturers and consumers may soon have a small,

SCIENCE

Are vast amounts of hydrogen fuel hidden below Earth’s surface?

Drill rig in Nebraska run by Natural Hydrogen Energy LLC, which established its first hydrogen borehole in 2019 Viacheslav Zgonnik

SCIENCE

Global forecast for 2025 sees temperatures falling back below 1.5°C

A severe storm brought on by La Niña in Queensland, Australia Genevieve Vallee / Alamy Stock Photo The average global

SCIENCE

Chips linked with light could train AI faster while using less energy

The prototype of an IBM optics module for connecting chips with fibre optics Ryan Lavine for IBM An optical fibre