Sometimes I find myself walking down corridors on campus where you can see the graduation photos for past years of the UC Davis School of Veterinary Medicine. I'm struck by how much the gender balance has changed. In 1952, the oldest year for which a photo is shown, there are no women at all. I'm sure this is probably true of many other academic departments from this era, particularly in STEM subjects.

Fast forward 50 years or so, and the situation is very different. The latest graduation photo, from 2011, shows that 102 of the 125 students are women. Quite a reversal. I wonder how many other departments or schools have seen such a dramatic switch.

Here is how the gender balance has changed over time.