Hundreds of animals, from tiny ants to mighty hippos, are shaping the Earth's surface as powerfully as floods and storms.

Bringing back beavers will boost nature, supporters say, as they build dams which create ... two underwater entrances and a living chamber above water where the animals sleep and shelter.

Animals living about 500 million years ago spent time on mudflats that were periodically exposed to the air. The finding suggests that some of the earliest animals were able to survive outside of ...

Here are ten of the longest-living animals on Earth ... which lowers the water quality for filter-feeding, and dams that separate the mussels from the host fish species they rely on to reproduce.