jackrattan's profile

Joined about about 4 years ago.

jackrattan's timelines

John Tyndall (8/2/1820 - 12/4/1893)
John Tyndall (8/2/1820 - 12/4/1893) timeline
Thomas Samuel Kuhn (7/18/1922 - 6/17/1996)
Thomas Samuel Kuhn (7/18/1922 - 6/17/1996) timeline