Contact and tip info

Doug Sweetser email: sweetser@alum.mit.edu twitter: visualphysics

If it is really important to you, a google hangout can be arranged.

Web sites

• Quaternions.com, the mothership of my private research project.

• Numbers 101, a visual introduction to space-time numbers, aka quaternions.

• Measurement 101, a site dedicated to my new proposal for quaternion gravity

• VisualPhysics.org has a collection of analytic animations generated with a user-hostile set of tools I wrote.

Tip Jar

This is a part-time job for me that eats real money (~$60k over 2 decades).

https://cash.me/$VisualPhysics