Nearly half of all species on earth are in population decline

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Some scientists say we're entering a ‘sixth mass extinction’ event

A new study shows global loss of wildlife is ‘significantly more alarming’ than previously thought, with nearly half the world’s known species in population decline

Study: NYC is sinking under the weight of skyscrapers

States reach landmark deal on water cuts to stave off crisis on Colorado River

Hurricane season starts next week. Forecasters are already watching a system

Climate activists dump charcoal in Rome’s Trevi Fountain

Saber-toothed mammalian ancestor reveals how unstable life was during ‘the Great Dying’