New fossil evidence points the way toward solving the mystery of how the animals arrived in the New World.
Driven by demand from Asian consumers, rising prices, and made possible by new technologies -- gold mining is threatening some of the most diverse tropical forests in South America.
Venezuela now has its first meat-loving dinosaur, a scrappy carnivore known as Thief of Tachira.
Is there anything left to discover? Have the most important temples, tombs, pyramids, cities, and civilizations been found?
Dust from the Sahara blows minerals from fish fossils across the Atlantic and helps plants grow in the Amazon rainforest.
Mind-altering substances were all the rage 1,500 years ago, at least among certain elite members of a South American society.
A sandstorm exposes undiscovered geoglyphs near the mysterious Nazca rock lines.
Venezuela's first-known dinosaur provides some of the earliest evidence that at least some dinosaurs lived in herds.
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