During a field expedition to the "heart" of the Amazon basin in Brazil, researchers discovered two small fish in the region's tea-colored waters that were previously unknown to science. The first ...

It turns out the world's heaviest snake isn't quite what it seems. During the filming of an upcoming National Geographic series, it was discovered that the green anaconda is actually two genetically ...

A new species of bacteria of the genus Bartonella has been found in the Amazon National Park in the state of Pará, Brazil, in phlebotomine insects, also known as sand flies. This type of insect is ...

Deep in the Ecuadorian Amazon, researchers set out to survey which spider species, known and unknown, may lurk in the tree canopy. Using a strategy called canopy knockdown, the team fogged the canopy ...

The new tetra fish species measure about half an inch long, according to researchers. Photo by Lopez, G. G. S., Souza, C. S., Reia, L., Mantuaneli, L. A., Morales, B ...