A new contest being posted by brilliant Princeton University biologist, Lee Silver, should definitely appeal to the competitve instincts of Reason readers. The contest features five different substances that millions of Americans take in order to boost their mental capacities in some way. Some are legal; some are not. The goal of the contest is to identify the chemicals and their legal status.
Go here to test your chemical and legal acumen. Chemists and biochemists may not participate.
I interviewed Silver for Reason back in 1999.