Before you can submit a comment you need to validate your humanity by typing in the code that you see at the bottom of the comment form.
You probably don’t like spam. We don’t either. Especially comment spam. That’s when bots search the web for comment forms like the one on our site and countless others, then submit fake information. So to combat this, at the bottom of the comment form an image appears with a random string of lop-sided numbers and letters. Bots can’t read them, but people can. When you enter the code and it matches, you have proven that you’re human, and your comment gets submitted. This is sometimes called a “reverse Turing test”.