In one case, a group of conservationists has already taken it upon itself to try on their own to save an endangered tree, the Florida Torreya tree, through Assisted Migration.
Modern birds are direct descendants of Maniraptoran dinosaurs, experts say. The creatures that went extinct millions of years ago are now called "non-avian dinosaurs."
Few people need convincing that the destruction of rain forests, the mass extinction of species and the melting of the ice sheets in Greenland would all be very bad things.
And I will make a covenant of peace with them, and will cause the evil beasts to cease out of the land: and they that dwell in the wilderness shall sleep secure in the forests.
The late Cretaceous extinction of the dinosaurs and ammonoids was just one of the more drastic in a whole series of such recurrent extinction episodes.
It is one of the factors controlling the size of competing populations, and in extreme cases it may lead to the extinction of one of the competing species.
In my view, competition for the use of scarce resources must be restrained for social survival, because rent dissipation under unrestrained competition would result in starvation for all.
Gause performed numerous tow-species experiments in the laboratory, in which one of the species became extinct when only a single kind of resource was available.
From the standpoint of a traditional educator, this outcome indicated that schooling had failed to help students think about ecosystems and extinction, major scientific ideas.