You probably don't know who Alan Scott is but every celebrity in the world and every person who wants to look young probably owes the guy a debt of gratitude. Back in 1989, Alan Scott developed Botox. In 1991 he sold it to Allergen for just $4.5M. Financial people have estimated that if he had held on to the secret he would probably be making $1B a year from his invention. He is not the person though who first noticed it made people look young. That was actually not discovered until 1992 when a Canadian doctor noticed people were losing their frown lines after being injected and published a study.