When the meteor hit earth 65,000,000 years ago nothing over 2.5 Kg survived except in the ocean where the weight was a bit greater... maybe 30Kg so the large sea reptiles died but the sharks didn't.
to stay alive
There are many different species of sharks in our oceans. Each breed has a different expected length of life.
kittens stay alive for 15 years
About 30 years.
Most shark species have a lifespan of 20-30 years, although some species can live to be 70 or more. The Greenland shark holds the record for the longest-lived shark species, with some individuals living over 400 years.
about 25 years
Sharks are meat eaters they are most likely to be found eating meat and to keep there weight up to be strong they have to eat meat in order to stay alive.
no it will stay good for millions of years
The element that can stay radioactive for millions of years is plutonium. This is where most nuclear power plant energy comes from.
By allowing it to stay alive and be strong enough to hunt. Sharks need their gills to breathe through. They don't help with the hunt as such, but they're critical for the shark's survival.
Most dogs (of no health issues) usually stay alive for 13-15 (or longer) years
They live for 12-13 years.