Amazon mollies don't need a man, and never will. A new study finds they can purge and repair genetic mutations that would ...

Deep in the vast rivers and flooded forests of the Amazon Basin, there lives a fish that appears to be prehistoric in both size and appearance. The arapaima, also called the “pirarucu,” is one of the ...

The Amazon molly reproduces without sex. A genomic copy-and-paste trick called gene conversion may explain how it avoids evolutionary meltdown.

For riverside communities along the Amazon, fish is not a menu choice—it is a lifeline. Millions of people in the Brazilian ...

Add Yahoo as a preferred source to see more of our stories on Google. Thousands of fish species — about 2,500 of them named — call the Amazon River home, but scientists estimate nearly half of the ...

Two years of record-breaking drought have dealt a heavy blow to what is arguably the Amazon's most successful sustainable economy: the managed fishery for the giant pirarucu. In Brazil´s Amazonas ...

Scientists in the Colombian Amazon have identified a tiny freshwater fish species called Priocharax rex, measuring just 0.8 inches in length. This discovery is significant as it represents the largest ...

Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. Thousands of fish ...