00:00Did you know that lobsters are practically immortal?
00:02To begin with, they do not die of old age like humans do.
00:05It turns out that as long as it keeps feeding, and no predator kills the lobster,
00:09it will continue growing without aging.
00:10While most animals grow old because their cells lose the ability to divide,
00:14the lobster has a secret weapon.
00:15It has an enzyme called telomerase, which rebuilds its DNA,
00:18allowing its cells to recover infinitely.
00:20But this comes at a price, because its body keeps growing without stopping,
00:23while its shell does not keep up.
00:25So it absorbs seawater and swells until it breaks its own armor, so it can get out.
00:29This process is extremely exhausting,
00:31and for several days, it is left completely defenseless against predators.
00:35The problem is that it does this repeatedly,
00:37until there comes a point when its body no longer has enough energy,
00:39and it dies of old age.