The northern green anaconda has been identified as a new species after genetic analysis showed it split from its southern counterpart 10 million years ago. When you purchase through links on our site, ...

Quick Take Reaching a size 5 times larger than males is a biological benchmark for breeding females. Holding breath for 10 ...

The green anaconda, an aquatic snake often found in South America's Amazon region, is the largest of its kind — measuring nearly 21 feet in length, according to experts. Now, the snake behemoth has ...

Anaconda footage from the Amazon forest in a Nat Geo series shows scientists sampling a giant Green anaconda, tied to a proposed new species.

There are hundreds of deadly snakes in the world, but only a few that actually want to eat you—and have the size to do it. A 2011 research article published in the Proceedings of the National Academy ...