TEMPO.CO, Medan - Delima Silalahi, an environmental activist in Toba Regency, North Sumatra, received a package containing a bloody carcass of a bird at her home in Silangit, Toba, on Friday morning.

Flightless birds, however, are another story. At least two factors have allowed dinosaurs, including birds, to evolve to a wide range of sizes.

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Towering up to 10 feet tall with massive beaks and terrifying speed, these giant flightless birds dominated South America for millions of years.

Federico Degrange at the Center for Research in Earth Sciences in Córdoba, Argentina, and his colleagues looked for terror-bird fossils in the La Venta site in Colombia, one of the richest fossil ...

The past few weeks have been a great time to get outside, although the extended late warm spell comes with its own set of challenges. Mainly insect-oriented. Biting mosquitos and ...

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Analyzing a leg bone from a fossil site in Colombia, scientists have identified a massive “terror bird” that lived about 12 million years ago.

Degrange has studied terror birds for almost 20 years, and he immediately recognized a structure in the front part of the bone that is only found in birds. And the oblique slant of the structure, ...