Derek Lowe is a drug discovery chemist with 20 years of experience in the pharmaceutical industry, which is still very much his day job. He's worked on projects targeted at Alzheimer's, cancer, diabetes, infectious diseases, and other areas, but like most discovery scientists in the business, he has yet to produce a marketed drug. Explaining how and why this happens is what led to the launch of his blog, "In the Pipeline", in 2002, and the explaining continues. . .