Strange Days on Planet Earth

Across the world, plants and animals are silently finding their way into places where they don't belong. These interlopers, called invasive species, have enormous powers — they spr...

Dust clouds are building high over the Atlantic. An entire population of caribou is declining, while other species are pushed to the limits of their physical survival in the oceans...

Around the world, from the forests of Venezuela to Yellowstone’s majestic wilderness to the Caribbean’s coral reefs, researchers are discovering predators play a vital role in the...

Frogs are vanishing in America’s heartland. Canadian beluga whales are mysteriously dying in the Saint Lawrence River. Swarms of sea stars are overrunning parts of Australia's Grea...