Why overfishing leads to smaller cod

Overfishing, hunting and intensive agriculture and forestry can sometimes contribute to plants and animals becoming endangered. New research from Lund University in Sweden and University of Toronto can now show why this leads ...

Antarctic lava yields clues to Earth's past magnetic field

The movement of molten metals in Earth's outer core generates a vast magnetic field that protects the planet from potentially harmful space weather. Throughout Earth's history, the structure of the magnetic field has fluctuated. ...

Ultraviolet light helps marine animals to tell the time of year

Most organisms on Earth depend on the energy from the sun. Sunlight is also an important coordinator of life's timers. Animals take important cues for proliferation, activity, feeding, or sleep from changing light conditions. ...

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