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TOPIC: Savannah

Blobrana

L

Posts: 131433

Date: Aug 3 20:35 2015

African Savannah	Permalink

4 million years at Africa's salad bar As grasses grew more common in Africa, most major mammal groups tried grazing on them at times during the past 4 million years, but some of the animals went extinct or switched back to browsing on trees and shrubs, according to a study led by the University of Utah. Read more __________________

Blobrana

L

Posts: 131433

Date: Aug 5 15:46 2011

RE: Savannah	Permalink

Early Human Ancestors were at Home on the African Savanna Viewing the African landscape that our distant human ancestors saw millions of years ago may not require much imagination, if a recent University of Utah study has anything to do with it. The study, involving a new method of measuring and analysing chemical isotopes in comparative samples of modern and fossil-bearing (paleosol) soils, allowed a team of scientists to determine the canopy density or tree cover in East African prehistoric environments going back more than 7 million years, the time when human ancestors and their ape cousins were evolving. The result: Wherever the fossils of early human (hominin) and related ape species were discovered, there was strong evidence that the prehistoric environments in which they lived consisted predominantly of open habitats much like the savannas we see today -- wide-open grasslands spotted with trees. Read more __________________

Blobrana

L

Posts: 131433

Date: Aug 3 19:05 2011

	Permalink
6 Million Years of Savanna University of Utah scientists used chemical isotopes in ancient soil to measure prehistoric tree cover - in effect, shade - and found that grassy, tree-dotted savannas prevailed at most East African sites where human ancestors and their ape relatives evolved during the past 6 million years. Read more __________________

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