Learn how frog eggs and fish eggs differ in structure, habitat, development, and survival, and what they reveal about the ...

Many of the trout the Idaho Department of Fish and Game stocks into Idaho’s streams, lakes and reservoirs cannot reproduce.

In the animal kingdom, penises can be spiked, split, corkscrewed—even detachable. They're one of the most diverse structures in biology. The human penis is so uniform, it's an anatomical outlier.

Loren E. Babcock, The Ohio State University, introduces research on Cladoselache, a puzzling ancient shark-like fish ...

Eve was one of dozens of Thai women who traveled 4,000 miles to become surrogates, on the promise of generous fees. It turned ...

When males are forced to compete for females, new species form more rapidly. This has been shown in a new study where the ...

The health of the Amazon forest and river are intertwined. By storing carbon, the forest can be a key part of climate solutions but plans for expanding hydropower could undermine that climate solution ...

Large litters are not uncommon in the animal kingdom, but some species give birth to thousands, and even millions, of young.

Strong competition for mates triggers dramatic changes in beetles, offering rare insight into the early stages of species ...

The health specialist has published a book that has 80 recommendations for avoiding toxins, as well as advice for a healthier ...

A green light has been turned on for domestic salmon farming to replace imported salmon. The Gyeongbuk Province Fisheries ...

In the wild, Florida’s manatees already face threats from cold stress, habitat loss, boat strikes and other human activities.