A federal judge in Oregon has decried the US government's efforts over the past two decades to ameliorate the impact of four dams on endangered fish populations, demanding a fresh approach.
Explorers identified a small jellyfish called hydromedusa, likely part of the genus Crossota.
Anglers in Naples, Fla., caught more than they expected when an endangered sawfish became hooked on their line. Watch, as the fishermen struggle to free the creature.
The armed militia-style takeover of Malheur Wildlife Refuge has prompted some unintended consequences.
Healthy coral reefs can reduce the power of tropical storms. But thanks to rising ocean temperatures, the world is losing coral reefs even as tropical storms are slated to increase.
The young female tiger roamed the streets of Conroe, Texas, with a leash and collar before being captured Thursday. Animal rights groups say the patchwork of laws on keeping exotic animals as pets can harm both animals and humans.