Sentences with phrase «mammals on those other continents»

Over time, the average body size of mammals on those other continents approached and then fell well below Africa's.

Not exact matches

Marsupials have evolved in Australia several forms which occupy ecological niches held on other continents by placental mammals — wolf - like, squirrel - like, mole - like, woodchuck - like, etc..

By that point, the average African mammal was already 50 percent smaller than those on other continents, the study reported, despite the fact that larger landmasses can typically support larger mammals.

We plan on using it to study other large - scale evolutionary patterns such as how early placental mammals dispersed across the continents via land bridges that no longer exist today.»

As archaic humans, Neanderthals and other hominin species migrated out of Africa, what followed was a wave of size - biased extinction in mammals on all continents that intensified over time.

«One of the most surprising finds was that 125,000 years ago, the average body size of mammals on Africa was already 50 percent smaller than on other continents,» said Smith, a professor in the UNM Department of Biology who has studied megafauna extinction for more than 15 years.

The continent has suffered more than a quarter of all recent mammal extinctions, and many other native species survive only as small populations on one or more of the country's thousands of islands.