I watched this show today and one of the scientists said she discovered the secret to anti-ageing when studying Tetrahymena (this, in the fish world, we know as a parasite of fishes). These protozoa are capable of continually dividing/multiplying without limit because they are able to repair and maintain the length of their telomeres (at the ends of their DNA) with telomerase.
Studies have shown that lobsters also have strong telomerase activity, and so, they never age at a cellular level. Theoretically then, they can live for eternity!
In humans, decreasing stress levels can help with extending the telomere length.
Maybe Tetrahymena and lobsters are just cool and calm critters.
