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A recent study found that female baboons that groom each other are more likely to come to each other
Earth’s history is divided into nested sets of time--eons, eras, periods, and epochs--and is called
The recent mass upheavals in Tunisia, Egypt, Libya, Yemen, and Syria gave political scientists a cha
When the United States gets stuck over a controversial issue—usually something a divided Congress ca
Socrates (470–399 B.C.E.) was an Ancient Greek philosopher often called the "father of ...
A square matrix P is called a permutation matrix if each row and column of P contains exactly ...