In 1996, a sheep named Dolly was the first mammal to be cloned from a somatic cell.
They also have a field of vision of around 300 degrees, allowing them to see behind themselves without having to turn their head.
There are over 1 billion sheep Ovis aires in the world, China has the largest number of sheep in the world. Domesticated sheep are raised for a number of agricultural products including fleece and meat. The digestive system of sheep features four chambers which help break down what they eat. They like to stay close to others in a herd which makes them easier to move together to new pastures.
They eat a lot of invasive weeds and grasses, so many farmers use them as a method of weed control, and have been observed to be as effective as herbicides in many cases.