THEY CAN QUITE LITERALLY SAVE YOUR LIFE

Cats have a reputation of being aloof and not caring about their humans, but they have saved countless lives over the years. One cat in the United Kingdom warns her human when he’s about to have an epileptic seizure, while a cat in Montana woke up its two humans when a gas pipe started leaking. Firefighters told the couple that the house could easily have exploded if not for cat’s intervention.

One cat has even received the highest medal available to military animals. Simon the cat was onboard the HMS Amethyst, which was sailing up the Yangtze in 1949 when a shell hit the ship, killing several marines and severely injuring Simon. (The event marked the beginning of the 101-day siege of the ship, which would become known as the Yangtze Incident.) Simon was fixed up, and despite being injured, performed his ship duty and started catching the rats that were threatening the ship’s food supply, as well as providing moral support for the surviving sailors. Simon died not long after the ship returned to the UK, but he was posthumously awarded the UK’s Dickin Medal, recognized as the animal Victoria Cross, for "behaviour [of] the highest order, although the blast was capable of making a hole over a foot in diameter in a steel plate."
Source: http://mentalfloss.com/article/51154/10-scientific-benefits-being-cat-owner