What if you could be smarter, stronger, and have a better memory just by taking a pill? 

What if we could alter our genes to cure Alzheimer's and Parkinson's?

What if we could halt or even reverse the human aging process?

What if we could communicate with each other  simply by thinking about it?

These questions were once the stuff of science fiction. Today, advances in biotechnology have shown that they're plausible, even likely to be accomplished in the near future. In labs around the world, researchers looking for ways to help the sick and injured have stumbled onto techniques that enhance healthy animals--making them stronger, faster, smarter, and longer-lived--in some cases, even connecting their minds to robots and computers across the Internet. 

Now science is on the verge of applying this knowledge to healthy men and women, allowing us to alter humanity in ways we'd previously only dreamed possible. The same research that could cure Alzheimer's is leading to drugs and genetic techniques that could boost human intelligence. The techniques being developed to stave off heart disease and cancer have the potential to slow or even reverse human aging. And brain implants that restore motion to the paralyzed and sight to the blind are already allowing a small set of patients to control robots and computers simply by thinking about it.