Creatures now are found only in Southeast Asia's Mekong River but in the past inhabited length of 4,900-kilometer waterway ...

Discover the bigmouth buffalo fish, a 100-year-old freshwater marvel that defies aging and faces an uncertain future. Learn about its biology and conservation.

Water quality has improved in some parts of Indiana, advocates say, in part because of increased regulations. Another element in the resurgence in those places has been a source some might not expect: ...