'Ultrashort' PFAS compounds detected in people and their homes

Per- and polyfluoroalkyl substances (PFAS) have become ubiquitous throughout the environment, and increasing evidence has demonstrated their deleterious effects. A group of smaller, fluorinated compounds are becoming replacements ...

Researchers reconstruct earliest known composite-tiled roofs

Researchers from Peking University School of Archaeology and Museology collaborated with the Gansu Provincial Institute of Cultural Relics and Archaeology to reconstruct the world's earliest composite-tiled roofs. Their findings ...

Why does your life flash before your eyes near death?

Survivors of close calls with death often recall extraordinary experiences: seeing light at the end of a tunnel, floating outside their own bodies, encountering deceased loved ones or recapping major life events in an instant.

Neuroptera: Greater insect diversity in the Cretaceous period

Human activity is currently driving a loss of natural diversity that some experts describe as the sixth major mass extinction event in the history of the Earth. The decline in insects is particularly alarming: Insects are ...

Narwhals' hungry summers as climate warms

Narwhals may not be much good at hunting in summer, according to new research that warns the unicorn-tusked whales may be dangerously reliant on their ice-bound winter habitat that could "disappear" with climate change.

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