Science
How Tides Work: The Moon’s Pull on Earth’s Oceans
Tides rise and fall twice each day, pulled by the Moon's gravity. Here is exactly how the Moon's pull moves entire oceans,…
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Drip Irrigation: The Engineering Behind Saving Every Drop of Water
Flood irrigation wastes most of its water; drip delivers it drop by drop to roots. The engineering, economics and scale-up of saving…
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Deep-Sea Trenches: What Lives at the Bottom of the Ocean
Deep-sea trenches plunge nearly 11 km into darkness and truly crushing pressure. Here is what scientists have found living at the ocean's…
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Plate Tectonics: How Continents Drift and Oceans Grow
India is crashing into Asia at 5 cm a year, raising the Himalayas. Plate tectonics explained: drifting continents, quakes, volcanoes and India's…
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Hydrothermal Vents: Oases of Life Around Underwater Volcanoes
Around underwater volcanoes, entire ecosystems thrive with no sunlight at all. Here is how hydrothermal vents became oases of deep-sea life.
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Reservoir-Induced Seismicity: Why Big Dams Like Koyna Can Trigger Earthquakes
In 1967 a magnitude 6.3 quake struck beneath Koyna's reservoir. How the weight and seeping water of big dams can wake sleeping…
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Ocean Upwelling: How Deep Water Feeds the World’s Fisheries
Where deep water rises to the surface, coastal fisheries boom. Here is how ocean upwelling fertilises the seas that feed hundreds of…
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Volcanoes: What Erupts, and Why Some Explosions Are Catastrophic
Hawaii oozes, St. Helens explodes: the difference is magma chemistry. What erupts from volcanoes, and why some eruptions turn violent and catastrophic.
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The Great Ocean Conveyor: How Currents Move Heat Around the Planet
A global conveyor of currents moves heat around the planet like a bloodstream. Here is how it works, and why scientists fear…
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How Caves Form: The Geology of Stalactites and Limestone Caverns
Stalactites grow a centimetre a century as acid dissolves limestone. The slow chemistry sculpting caves from Meghalaya to Borra, and their climate…