While exploring a quiet creek, I noticed movement that didn’t seem natural for the area. What I found were pufferfish and rare aquarium fish living in a place they were never expected to survive. This ...

Your complete guide, with expert tips from Gary Akavickas.

In the middle of the 19th century, French explorers captured 34 aquatic salamanders (Ambystoma mexicanum) from Lake Xochimilco in Mexico and relocated them to Paris. After a few of these animals, now ...