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Space

How excited should we be by signs of life spotted on alien worlds?

We keep spotting molecular “biosignatures” in the atmospheres of planets beyond Earth, but it isn't clear if any of them can provide definitive evidence that we’re not alone

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FG10H1 JUPITER: EUROPA, 1979. /nJupiter's moon, Europa. Photographed by Voyager 2, 1979.

Earth

Forget the Amazon – are these the most remarkable rivers in the world?

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Cano Cristales (River of five colors), La Macarena, Meta, Colombia; Shutterstock ID 774676180; purchase_order: -; job: -; client: -; other: -

Technology

Underwater walkie-talkies could work long-distance with radio trick

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Divers exploring rocky reefs
Umm al-Ma Lake - Idyllic oasis in the Awbari Sand Sea, Sahara Desert, Libya; Shutterstock ID 72697231; purchase_order: -; job: -; client: -; other: -

Environment

The surprising life and avoidable demise of Earth’s remarkable oases

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Earth from Space: Lake Maracaibo 03/11/2023 The Copernicus Sentinel-2 mission takes us over Venezuela?s Lake Maracaibo, the largest natural body of water in South America.

Earth

Stunning image of South America's largest lake hides a dark secret

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Life

Desert plant collects water from air by excreting salt on its leaves

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These 6 tipping points could be catastrophic for humanity, says the UN

Environment

These 6 tipping points could be catastrophic for humanity, says the UN

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Palestinians line up to fill water cannisters in Gaza

Health

Why the Gaza water crisis is decades in the making

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Environment

Global power sector has almost hit peak greenhouse gas emissions

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Wheat harvesting in Kansas

Environment

Curiously cool summers in US Midwest linked to crop irrigation

For 75 years, the US Midwest has experienced unexpectedly cool summer temperatures – the “warming hole” could be due in part to intensive agriculture

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GS1839667

Health

The ultimate guide to hydration and what you really should be drinking

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How we broke the water cycle and can no longer rely on rain to fall

Environment

How we broke the water cycle and can no longer rely on rain to fall

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Physics

Springy ice seen for the first time may explain how clouds make rain

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Device for water collection

Technology

Artificial spider silk could help us harvest drinking water from air

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