According to this interesting article in The Independent the reason Racehorses are able to run at such high speeds without overheating or losing consciousness, is because they are equipped with a biological radiator that keeps their brains cool.
Horses generate so much heat while galloping that their blood reaches temperatures of up to 104 degrees, enough to cause serious damage to a horse’s brain. However, before the blood reaches the brain it is cooled by moving past internal pouches filled with cooler air. This anatomical heat transfer system keeps the horse from damaging it’s brain in much the same way that the heat transfer systems in our cars keep our engines from suffering permanent damage or failure.
Of course, when a car overheats, the thing that suffers most is not the automobile itself but the cars owner. He or she is the one that has to deal with the stress and expense of getting the vehicle up and running. Fortunately Radiator.com is here to help.