Camels can drink up to 40 gallons of water in one go.Their temperature ranges from 34 degrees Celsius at night to 41 degrees during the day. They don’t begin to sweat until they are over 41 degrees. One reason camels can go long periods without water is the shape of their red blood cells. These are oval and so will flow when they are dehydrated rather than clumping, as ours do. The camel is the only mammal to have oval red blood cells. They can close their nostrils against wind and sand when necessary.
Although Christians and Jews lived under restrictions, for much of the time the three groups managed to get along together, and to some extent, to benefit from the presence of each other.
It brought a degree of civilisation to Europe that matched the heights of the Roman Empire and the Italian Renaissance.