As a ten-year-old boy, Artemis Fowl made an unfortunate bargain that caused the extinction of the silky sifaka lemur. Now his mother is dying from an illness that can only be cured by the brain fluid of the extinct lemur. Artemis again travels back in time to try to outwit his ten-year-old self and save the lemur and his mother.
Discusses the process of extinction, mass extinctions, numerous species that have become extinct over the millennia, and species that have come back from near extinction.
Describes the large sea mammal which lived in the cold Arctic waters for centuries until becoming extinct twenty-seven years after its discovery by a German naturalist.