Hippos are dangerous — highly territorial and fiercely protective of their young. They are capable of capsizing boats and inflicting serious injuries. The line of five canoes hugs the riverbank to ...

The Congo Basin in central Africa is one of the largest wilderness areas left on Earth, spanning 3.4 million square kilometers (1.3 million square miles). It’s home to over 10,000 species of ...

The Yangtze River in Yunnan province, China. This river is one of many large rivers to have experienced a significant decline in water flow over the past 35 years, according to new research.

Scientists used eDNA analysis to identify 125 species of aquatic and terrestrial animals in the remote Corubal River in West Africa. Image by Manuel Lopes-Lima.