Ancient beavers cut trees for food first, not to build dams

By studying the wood-cutting behaviour of ancient beavers that once roamed the Canadian high Arctic, an international team of scientists has discovered that tree predation—feeding on trees and harvesting wood—evolved ...

The giant geode of Pulpí

The geode of Pulpí is an 11-meter hollow ovoid with crystal-paneled walls. It is like those familiar couplets of stone interiors covered with bright crystallites, but so large that several people can fit inside. The crystals, ...

21st century archaeology has rediscovered historical Cordoba

On the land where Cordoba is located in the 21st century, two cities coexisted in the past, each on a hill. An Iberian city was located where Cruz Conde Park lies today, and a Roman city, which was founded at a later time, ...

Study of northern Alaska could rewrite Arctic history

Parts of Alaska's mountainous Brooks Range were likely transported from Greenland and a stretch of the Canadian Arctic much farther to the east, according to a series of Dartmouth-led studies detailing over 300 million years ...

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