California sea otters have been poisoned by the microcystin toxin. This sea otter pup is healthy. (Photo by R. Wilder, Monterey Bay Aquarium) A potent toxin produced by bright-green blooms of ...

A new study found dolphins in Florida's Indian River Lagoon have brain changes similar to those seen in human Alzheimer's disease. Scientists consider dolphins a sentinel species, meaning their health ...

New Guinea is home to some of the world’s most toxic birds. Why they contain poison, and how they withstand it is still a source of scientific mystery. The variable pitohui, a poisonous bird, captured ...

Colibactin is a powerful toxin produced by Escherichia coli and other bacteria living in the human gut. This highly unstable bacterial product causes mutations in DNA that have been linked to ...