Foster's rule
Videos
Foster's rule, also known as the island rule or the island effect, is an ecogeographical rule in evolutionary biology stating that members of a species get smaller or bigger depending on the resources
Garganornis ballmanni, a very large fossil goose from the Gargano and Scontrone islands of the Late Miocene
Pygmy mammoth
Videos
The pygmy mammoth or Channel Islands mammoth is an extinct species of dwarf mammoth native to the northern Channel Islands off the coast of southern California during the Late Pleistocene. It was desc
Foster's rule
…biology stating that members of a species get smaller or bigger depending on the resources available in the environment. For example, it is known that pygmy mammoths evolved from normal mammoths on small islands. Similar evolutionary paths have been observed in elephants, hippopotamuses, boas, sloths, deer (such as…
Mammuthus exilis
Excavation in 1994, Santa Rosa