Brain size in relation to body size provides some insight, as animals with larger brains live longer, reach sexual maturity slower and reproduce in smaller numbers.
Another theory states that metabolism, and its resultant expenditure of an animal’s tissue, is to blame for aging.
Why do dogs age so fast?
A dog’s body ages faster than a human’s, which means that their lifespan will be considerably shorter. Dogs age more quickly than humans because they have a higher metabolism, their bodies work harder, and they have different genetic make up than humans.
Why do dogs and cats age faster than humans?
The reason that dogs can reach full sexual maturity after only a year is that our canine friends age faster during the first two years of their lives than humans do. Compared to humans, dogs age more quickly at the beginning of their lives and slower toward the end.
Why do animals die so fast?
Lifespan is usually related to animal size
The main reason people used to think big animals live longer is because of something called metabolic rates. Smaller animals usually have higher metabolic rates, which lead to shorter lifespans, like a car that uses up its petrol very quickly.
Why do animals grow up faster than humans?
Humans take longer than other primates to grow up because their larger brains divert energy from body growth during childhood.