In fall 2023, hundreds of river dolphins turned up dead in Brazil’s Lake Tefé. At the time, researchers didn’t know what had ...

They've survived world wars, the great depression, the atomic age, and the dawn of the internet. They are buffalofish—and many of them are over 100 years old.

According to the Division of Wildlife Resources (DWR), they have been able to prevent the spread of aquatic invasive species ...