The fierce battle of rutting stags is a famous symbol of male animals competing over females. But it turns out the stags don't have things all their own way.
Teenage tyrannosaurs was even bigger and heavier than was thought, new research shows. And juveniles must have grown twice as quickly as previously thought.
Green roofs might be able to compensate for urban habitat lost at ground level, but there isn't much information of how well they match ground-based habitats.
A study of food remains from Peruvian settlements shows ancient farming undermined the natural vegetation so badly that much of the area had to be abandoned.
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