POPOCATÉPETL VOLCANO, Mexico (AP) — In the predawn darkness, a team of scientists climbs the slope of Mexico's Popocatépetl volcano, one of the world’s most active and whose eruption could affect millions of people.  For five years, the group from Mexico’s National Autonomous University has climbed the volcano with kilos of equipment, risked data loss due to bad weather or a volcanic explosion and used artificial intelligence to analyze the seismic data.  Now, the team has created the first thre

What's inside Mexico's Popocatépetl? Scientists obtain first 3D images of the whole volcano

This year will conclude as the second hottest on record, surpassed only by 2024. It continues a recent trend of exceptional, unexplained warming. The last three years have been, by a wide margin, the hottest ever recorded.

2025 Was Another Exceptionally Hot Year

There were breakthroughs in Alzheimer's disease and sleep apnea.

1st-ever disease gene fix, Alzheimer's blood test: 7 medical breakthroughs in 2025

From auroras at 36,000 feet to comet flybys and eclipses, these are the standout images our readers shared with Space.com in 2025.

Our 10 favorite Space.com reader astronomy photos of 2025

Dec 29 () - Novo Nordisk and Eli Lilly are lowering prices of their top-selling obesity drugs Wegovy and Mounjaro in China, according to the Danish ​drugmaker and Chinese drug suppliers. Novo did not give details on the new prices, ‌but media outlet Yicai reported earlier that list prices for the two highest dosages of Wegovy were cut by ‌48% to 987 yuan ($141) and 1,284 yuan per month respectively in some Chinese provinces.

Novo and Lilly cut prices of weight-loss drugs in China

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