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diet and exercise

Orcas

Life

Orcas are spreading further into the Arctic Ocean as sea ice melts

Orcas – also known as killer whales – used to be unusual visitors to the Arctic Ocean off Alaska, but they are becoming more common there, which might be bad news for local ecosystems

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Risso's dolphin

Life

Risso’s dolphins have invented rapid spin-dive technique for hunting

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Uranium, a chemical element with a U symbol and an atomic mass equal to 238 u, has an atomic number 92

Technology

Material inspired by blood vessels can extract uranium from seawater

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2AKEMKH Amazon river dolphin (Inia geoffrensis) Rio Negro, Amazonas, Brazil.

Life

The Amazon's pink river dolphin population is in free fall

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COP26: New alliance commits to ending oil and gas extraction

Environment

COP26: New alliance commits to ending oil and gas extraction

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Sweets

Environment

Buying fewer snacks and ready meals could slash US carbon footprint

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Cyclist

Health

Exercising more often doesn't increase your risk of knee arthritis

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HIV-infected T-cell

Health

Two people suppressed HIV for years while pausing medication

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Marijuana joint in a hand

Health

Quick saliva test can reveal cannabis use over the past 12 hours

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American food

Health

Highly processed junk food consumption is rising among US adults

US adults are eating more highly processed junk food now than they were 20 years ago, with the trend particularly clear among those without a college degree

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Health

Women are less likely to get pregnant for two years after a concussion

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Health

Massage gun for mice shows how pummelling tissue boosts muscle repair

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Humans

Eating to Extinction review: Are our bland diets bad for the world?

Culture

Health

DNA markers reveal if you shared a womb with twin that didn't survive

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