As Earth's surface heats up, the upper layers of the atmosphere are growing colder — and carbon dioxide is responsible for both effects simultaneously.
CO₂ cools the thermosphere by emitting infrared radiation directly into space.
The upper atmosphere has cooled markedly as global emissions have risen over decades.
Thermosphere cooling reduces drag on low-orbit satellites, complicating space traffic management.
The WHO had warned that further cases would emerge following the hantavirus outbreak aboard the MV Hondius. The first confirmed case outside the ship has now appeared in Canada.
A new hantavirus case has emerged in Canada, linked to the MV Hondius outbreak.
The WHO had warned further cases would follow after the onboard cluster was identified.
Hantavirus can cause severe pulmonary syndrome; no specific approved antiviral therapy exists.
Italian researchers found that unborn babies mimic their mothers' yawning in utero — upending the long-held theory that this social behaviour only develops after birth.
Fetuses mimic their mothers' yawning in the womb, Parma researchers found.
The theory that contagious yawning is a postnatal behaviour has been overturned.
The discovery raises new questions about the prenatal roots of empathy and imitation.
Researchers are closing in on the chemical signature of skin that makes certain individuals far more attractive to mosquitoes — and the findings could reshape insect repellent technology.
Each person's skin emits a unique chemical mix that determines mosquito attractiveness.
Skin microbiome bacteria convert human compounds into odours insects can detect.
Findings pave the way for personalised repellents tailored to individual skin chemistry.
Scientists have shifted the search for extraterrestrial life from specific molecules to the statistical patterns in which those molecules are organized.
Living systems leave a statistical fingerprint in the distribution of chemical compounds.
The method targets organizational patterns, not the presence of specific molecules.
The approach could inform the design of future planetary exploration missions.
Three science stories of the week: fiber optics that pick up sound, hearing aids that cut dementia risk, and a genetic secret seven centuries in the making.
Fiber-optic cables can capture sound, acting as large-scale microphones.
Hearing aids reduce dementia risk in older adults, new research confirms.
Genetic variants from Black Death survivors still affect European immunity today.