No doubt you have heard the claims from young earth creationists about living fossils. A “living fossil” is an organism that is thought to have been extinct, and then it shows up alive on planet earth.
The claim by young earth creationists is that these living fossils are proof that the earth is young. The reasoning is that since all organisms were alive only 4,300 years ago, before the time that they date the Flood of Noah, then it is reasonable to assume that they are still alive today.
I’m sure everyone is aware of the most famous living fossil, the coelacanth, the fish thought to be extinct 65 million years ago. In 1938, a specimen was caught off the coast of South Africa, and since then several more have been caught and examined. Besides the coelacanth, Answers in Genesis gives several examples in the articles linked above.
Determining an Organism’s Life Span
How is a fossil’s life range is determined? When an organism is found in the fossil record, paleontologists look for the oldest and youngest specimen to determine it’s life range. For example, if the oldest specimen of a species of dinosaur is in a rock...