A male moose grows enormous flat antlers on its head. They can spread two metres from tip to tip - wider than most grown-ups are tall. The antlers fall off every year in winter and grow back even bigger by the following autumn. Female moose don't grow antlers.
Moose are brilliant at the things you might not expect. They can run at 55 km/h, faster than most cars on a country road. They are excellent swimmers - they cross lakes happily, and can swim several kilometres in one go. They can also dive underwater to eat plants on the bottom of a lake.
Moose eat tree leaves, twigs, water plants and even underwater roots. An adult moose chomps through about 30 kilograms of greenery a day. In winter they switch to gnawing on tree bark. Their long legs let them step through deep snow without getting stuck.
Even though they are huge, moose are usually shy. Most Swedes who walk in the forest never see one, even though there are 300,000 of them. They prefer to be alone and quietly disappear when they hear people coming. Some Swedish roads have signs warning drivers about moose crossings, with a giant black moose silhouette.