Does nature always know best? The British government has approved the reintroduction of beavers to the countryside, but not everyone is enthusiastic about the idea.
Eager beavers save £1m with dam build
Eco engineers: Until now, beavers in England had to stay behind fences, despite some wild escapees. Now they will be allowed to roam free. Glossary
Ecosystems - Complex networks of living things that rely on each other to survive.
Native - A person born in a specified place, or a plant or species indigenous to an area.
Extinct - A species that no longer has any living members.
Rewilding - Returning developed or farmed land to its natural state by reintroducing species that once lived there.
Bavaria - A state (or region) of southern Germany.