I would like to keep Pop Physics online, continually updated, and ad-free for as long as possible. Donations – even small ones – help me to do so.

If you like what you see on the site, any small (or ludicrously oversized) token of your graditude will be very much appreciated.

Furthermore, every time you donate, your browser will take you to a page that has a very cute picture of a dog with a cat on its head. I guarantee you that it’s worth it.