Although opinions differ as to what determines sexual orientation, most scientists believe that for males it is primarily inborn. Simon LeVay, for example found a cluster of nerve cells in the hypothalamus that is larger in heterosexual males than...
Why have so many people lost the battle to achieve and maintain a healthy weight? Some people blame metabolism for excess weight; others think it is a matter of willpower. Both factors are affected by a person's genes, perhaps a leftover survival me...