
How Much Sunscreen Should I Use?
Ever wanted to know precisely how much sunscreen to use? Well, I don’t know how to help you with that. But I can tell you how to get a reliable reading on how much ultraviolet light is bombarding you. At least if you live in San Carlos, California. Just check

Under the Gun
Yesterday I was riding I-280, killing time and having fun until I needed to be at Ray Mueller’s meet -and-greet in San Carlos. The traffic was going maybe 10 MPH more than the speed limit but no one was going bizarrely fast. All of a sudden, though, it slowed down
Latest Thoughts on the Origin of Covid-19
Science magazine, the primary journal of the American Association for the Advancement of Science, had a really interesting article on the latest work being done on trying to figure out where Covid-19 came from. While occasionally dense it’s worth reading.

How the Coronavirus Infects
This post is based on a fascinating article from the July 29, 2021 issue of Nature. I like to say I studied molecular biology back in the Dark Ages, aka the 1970s. At the time what I was taught was cutting-edge, representing the beginning of insights into how the laws

American Republics: A Continental History
I’ve read a lot of great books in my life. But every once in a while I stumble across one which offers an epic experience. Opening up perspectives I didn’t realize I lacked, or offering a powerful theory explaining things that previously were a disorganized jumble of data. Heretofore my
The Kindness of Strangers towards White-Haired Guys
I found a fun new local ride last week. And I learned, once again, there are lots of kind-hearted people in the world. The route was a new and different way of getting over to CA-9 at Boulder Creek. From there, taking 9 up to Skyline Boulevard (aka CA-35) and