brainwagon

I pride myself on being able to carry out calculations in my head that cause most people to go for the calculator. Need to calculate a 15% tip? Divide the total bill by 10, and then divide by 2, and then add the results. Easy. Sometimes while exercising on a bike I try to factor [...]

Well, today is the the vernal equinox, known more informally as the first day of spring.  It’s a blustery, rainy day here, and it probably would have gone unnoticed by me except for the mention on Phil Plait’s Bad Astronomy Blog.  The equinoxes are a busy time for Phil, who debunked the idea that on [...]