Horse - One of a number of animals which moved into the birch and pine wooded landscape and marshland after the last ice age around 15,000 BC. The domesticated horse is believed to have appeared in the Ukraine in eastern Europe as food around 4000 BC, and for riding in central Asia around 2500 BC. The domestic animal is believed to be a descendant of Przewalsky's horse. The earliest evidence of the horse in Britain was found at ??? Horse bridles and bits appeared around 1800 BC, and became more elaborate during the Bronze Age and Iron Age