Extinct species?

A sea dinosaur, plesiosaurus, is thought to have been caught in a fishing net in 1977 off the coast of New Zealand. A Japanese stamp was created for this creature in 1977. It should have been extinct.

An ancient fish, the Coelacanth, supposedly lived 340 – 80 million years ago, is now extinct. Or so scientists said. These have been discovered alive and well in South Africa, off the coast of Madagascar, in 1938 and more recently in the seas of Indonesia.

Really makes one question how accurate dating techniques are and the real timeframe of these animals as well as the age of the earth.