I'm sorry, I should have included the URL. It is from a site called XKCD, very popular in some circles:
https://xkcd.com/
Here's another good cartoon about science, although it might be a little small in this forum
The link to the full version is:
https://imgs.xkcd.com/comics/beliefs.jpg
You can find the larger version at
https://xkcd.com/154/
