Recently, we have all seen the controversy over whether or not we should attempt to clone. If you haven't heard: A group of scientists in Scotland announced the birth of a sheep cloned from embryonic cells, presaging Dolly. Dolly's was the birth heard round the world. The first mammal ever cloned...

Since our genes dictate to a large extent what we look like, how we behave and what we can and cannot do, having identical genes, as identical twins do, ensures something more than mere similarity. Novelists and filmmakers have not been slow to exploit the imagery afforded by cloning. Limitles...

"Before we assume that the market for human clones consists mainly of narcissists who think the world deserves more of them or neo-Nazis who dream of cloning Hitler or crackpots and mavericks and mischief makers of all kinds, it is worth taking a tour of the marketplace. We might just meet ours...

Test Through Time Evolution is the process of developmental unfolding that takes place over a long period of time, and starts with a simple form then gradually grows into a more complex organism. Humans, for example, have been evolving for about eight million years to mold us i...