These rhinos can weigh more than two and a half tonnes - about the weight of a small car. But they are surprisingly fast over short distances and can outrun a person without breaking into a sweat. They are also great swimmers and can stay underwater for long periods, like a snorkel - peeking just their eyes and nostrils above the surface.
Most of the day a rhino spends grazing on grass. They eat huge amounts of it - over 50 kilograms a day. They also love a good mud bath, which cools them down and keeps their skin healthy and free of biting insects.
Mother rhinos look after their babies for a long time - up to three years. The calf walks close to its mum's side, and if anything seems dangerous, the mum stands between her baby and whatever it is. Rhino mums are famously protective.
In Nepal, you can sometimes see rhinos from a safe distance in Chitwan National Park. Park rangers work day and night to look after them. Around forty years ago there were very few left, but careful protection means there are now more than 700 in Nepal.