The Sixth Extinction: An Unnatural History

honeybees
honeycreeper
black-faced Hawaiian po`ouli
red-legged
Hönisch, Bärbel
Houck, Marlys
Houston Zoo
Howe Caverns
humans (Homo sapiens)
ability of, to change world
demise of earlier humans and
demise of great apes and
dependence of, on earth’s systems
distinguishing characteristics of
evolution of
extinction caused by
extinction of megafauna and
fossil record left by
impact of, on biosphere
invasive species and
migrations of
Neanderthals and
population growth
success of
threat to survival of
Humboldt, Alexander von
Hunter, William
Iapetus
IBIS (Island Biodiversity and Invasive Species Database)
ice caps
Iceland
ichthyosaur
iguanodon
Ilex genus
impact hypothesis
index fossils
insects