Tag Archives: americans

african_genetic_variation

Africans have world's greatest genetic variation

Study also found majority of African-Americans trace back to West Africa

Randolph E. Schmid

Africans have more genetic variation than anyone else on Earth, according to a new study that helps narrow the location where humans first evolved, probably near the South Africa-Namibia border.

Africans have world’s greatest genetic variation

Africans have world’s greatest genetic variation

The largest study of African genetics ever undertaken also found that nearly three-fourths of African-Americans can trace their ancestry to West Africa. The new analysis published Thursday in the online edition of the journal Science.

“Given the fact that modern humans arose in Africa, they have had time to accumulate dramatic changes” in their genes, explained lead researcher Sarah Tishkoff, a geneticist at the University of Pennsylvania.

People have been adapting to very diverse environmental niches in Africa, she explained in a briefing. Continue reading

Barack Obama

Americans high on Obama, direction of US.

WASHINGTON – For the first time in years, more Americans than not say the country is headed in the right direction, a sign that Barack Obama has used the first 100 days of his presidency to lift the public’s mood and inspire hopes for a brighter future.

Intensely worried about their personal finances and medical expenses, Americans nonetheless appear realistic about the time Obama might need to turn things around, according to an Associated Press-GfK poll. It shows most Americans consider their new president to be a strong, ethical and empathetic leader who is working to change Washington.

Nobody knows how long the honeymoon will last, but Obama has clearly transformed the yes-we-can spirit of his candidacy into a tool of governance. His ability to inspire confidence — Obama’s second book is titled “The Audacity of Hope” — has thus far buffered the president against the harsh political realities of two wars, a global economic meltdown and countless domestic challenges.

President Barack Obama

President Barack Obama

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