SA Special Editions Vol 13 Issue 2s

SA Special Editions

Volume 13, Issue 2s

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Features

An Ancestor to Call Our Own

Controversial new fossils could bring scientists closer than ever to the origin of humanity

Kate Wong

Early Hominid Fossils from Africa

A new species of Australopithecus, the ancestor of Homo, pushes back the origins of bipedalism to some four million years ago

Alan Walker, Meave Leakey

Once we were not Alone

Today we take for granted that Homo Sapiens is the only Hominid on Earth. Yet for at least four million years many Hominid species shared the planet. what makes us different?

Ian Tattersall

Who were the Neandertals?

Controversial evidence indicates that these hominids interbred with anatomically modern humans and sometimes behaved in surprisingly modern ways

Kate Wong

Out of Africa Again... and Again?

Africa is the birthplace of humanity. But how many human species evolved there? And when did they emigrate?

Ian Tattersall

The Multiregional Evolution of Humans

Both fossil and genetic evidence argues that ancient ancestors of various human groups lived where they are found today

Alan G. Thorne, Milford H. Wolpoff

The Recent African Genesis of Humans

Genetic studies reveal that an African woman from less than 200,000 years ago was our common ancestor

Allan C. Wilson, Rebecca L. Cann

Food for Thought

Dietary Change Was a driving force in human evolution

William R. Leonard

Skin Deep

Throughout the world, human skin color has evolved to be dark enough to prevent sunlight from destroying the nutrient folate but light enough to foster the production of vitamin D

George Chaplin, Nina G. Jablonski

The Evolution of Human Birth

The difficulties of childbirth have probably challenged humans and their ancestors for millions of years-- which means that the modern custom of seeking assistance during delivery may have similarly ancient roots

Karen R. Rosenberg, Wenda R. Trevathan

Once were Cannibals

Clear evidence of cannibalism in the human fossil record has been rare, but it is now becoming apparent that the practice is deeply rooted in our history

Tim D. White

If Humans were Built to Last

Bruce A. Carnes, Robert N. Butler, S. Jay Olshansky

Departments

The Original Human Interest Story