 - Last login: 7 hours agoDoctormark
- Mark is a 68 year old guy from Fullerton, California, USA.
- Likes 620 pages, 9 videos, 5 photos • 67 fans • Received 2 reviews
- Member since Nov 06, 2007
Welcome to my blog. I'm a retired physics professor with an interest in education. I publish an online journal called The Irascible Professor.
Favorites » His Discoveries
|
his Favorites
Add him as a friend >
