Are brains shrinking to make us smarter?

Human brains have shrunk over the past 30,000 years, puzzling scientists who argue it is not a sign we are growing dumber but that evolution is making the key motor leaner and more efficient.

Grassy beginning for earliest Homo

In 2013, an ASU research team found the oldest known evidence of our own genus, Homo, at Ledi-Geraru in the lower Awash Valley of Ethiopia. A jawbone with teeth was dated to 2.8 million years ago, about 400,000 years earlier ...

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Social environment

The social environment (context), also known as the milieu, is the identical or similar social positions and social roles as a whole that influence the individuals of a group. The social environment of an individual is the culture that he or she was educated and/or lives in, and the people and institutions with whom the person interacts. A given social environment is likely to create a feeling of solidarity amongst its members, who are more likely to keep together, trust and help one another. Members of the same social environment will often think in similar styles and patterns even when their conclusions differ.

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