Environment
Human-built ‘beaver’ dams help save struggling streams
To help restore streams, ecologists and other scientists are taking tips from the rodents — and hoping some beavers also join in.
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Physics
Scientists Say: Entropy
To understand the universe, we must look to entropy — the chaos engine of the cosmos.
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Health & Medicine
Explainer: What are ultraprocessed foods?
Packed with chemical additives, these foods have become a major part of our diets. Scientists have begun to worry about how ultraprocessed foods may impact health.
Technically Fiction
Physics
Could a Star Wars lightsaber work?
The main problem with real-world lightsabers is that they would pass through each other. This means no intergalactic duels between Jedis and Siths.
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As winters warm, athletes must cope with harder snow and tricky ice
Ice arenas and artificial snow now dominate the winter Olympics. Athletes there — and everywhere — may need to adjust how they train and perform.
