The reason is that in a group, individual errors on either side of the true figure cancel each other out.

Because of the complexity of the problem, environmental skepticism was once tenable. No longer. It is time to flip from skepticism to activism.

Play hard, work hard, love hard. . . .The bottom line for me is to live life to the fullest in the here-and-now instead of a hoped-for hereafter, and make every day count in some meaningful way and do something-no matter how small it is-to make the world a better place.

Science is the best tool ever devised for understanding how the world works.

My thesis is that morality exists outside the human mind in the sense of being not just a trait of individual humans, but a human trait; that is, a human universal.

It is sad that while science moves ahead in exciting new areas of research, fine-tuning our knowledge of how life originated and evolved, creationists remain mired in medieval debates about angels on the head of a pin and animals in the belly of an Ark.

In comparison, Google is brilliant because it uses an algorithm that ranks Web pages by the number of links to them, with those links themselves valued by the number of links to their page of origin.