About 445 million years ago, Earth’s oceans turned into a danger zone. Glaciers spread across the supercontinent Gondwana, ...
At some point in the deep past, humans may have come frighteningly close to disappearing altogether. Here’s what we know, ...
Contributed by Kea Giles, Managing Editor, GeologyBoulder, Colo., USA: Mass extinctions are extremely catastrophic events on Earth. Throughout Earth's ...
A dwarf elephant the size of a Shetland pony once roamed the Mediterranean island of Cyprus. In the West Indies, a giant rat-like rodent tipped the scales at more than 180 kilograms, rivaling an ...
Sixty-six million years ago, the dinosaurs had a really bad day when a colossal asteroid impact spurred their extinction. But ...
Speciation and extinction are the twin engines that have sculpted the diversity of life on Earth. Speciation, the process by which new species arise from ancestral populations, is driven by a mixture ...
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Chicxulub impact may have triggered a burst of rapid evolution
For decades, the asteroid that ended the reign of the dinosaurs has stood as a symbol of total planetary devastation. But ...
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