21.   He developed a theory that every molecule sends out a unique electromagnetic signal.

22.   He developed theories detailing the structure of the drug economy.

23.   He developed theories that many social theorists opposed.

24.   He developed his theory after working with physically handicapped patients who were trying to improve their motor functioning.

25.   He devoted much of his life in the years before the war to developing this theory and writing a book about it.

26.   I also began to develop my theory why I and maybe others had not been more inspired by Washington and his life.

27.   In fact, the disk-wind theory was first developed to explain these extra-galactic jets.

28.   In the meantime, though, he has developed several theories to account for his missing pet.

29.   In the recent match, Kasparov kept honing his mental model of Deep Blue, developing a theory of how the machine worked.

30.   It would be quite understandable if the Baltimore Orioles developed a Chicken Little theory that the sky was falling on them in Yankee Stadium.