The lifespan of mammals is about 1 and a half billion heartbeats.
127
A koi fish, named "Hanako", was owned by several individuals over many years and lived to be 226 years old, dying in 1977.
6
According to official documents, Luo Meizhen was born in 1885, which would make her 127 years old when she died in 2013 and the oldest person ever to have lived.
9
The gas that gives rotten eggs their distinctive foul smell may slow ageing and block damaging chemical reactions inside cells, according to scientists in China.
5
The oldest creature ever found was Ming the clam at an admirable 507 years old.
16