Washington, May 7: Scientists have come up with a controversial theory which suggests that huge comet impacts wiped out North America’s large mammals 13,000 years ago.

Washington, May 7: Scientists have come up with a controversial theory which suggests that huge comet impacts wiped out North America’s large mammals 13,000 years ago.

Washington, May 7: Can’t resist a piece of chocolate cake lying in front of you?

Washington - Senator Hillary Clinton c

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