Welcome to the 30 Day Challenge for July, where we’ll be looking at the STEM fields: Science, Technology, Engineering, and Math. I originally conceived of the as the Science & Math Challenge so those two categories will get more attention, but we will touch on all of them.

Today we want to know your favorite math or science joke. Corny is fine. Only tangentially about math or science is fine. Funny real life anecdotes are fine, whether they are from your own math and science life or some famous figure’s. Basically anything in the intersection of STEM and humor is good. Let’s use today to enjoy the lighter side of math and science.

Bonus: Do you know what’s purple and commutes?