Talk:List of retired Challenge Patches/@comment-25304012-20151007210200/@comment-25304012-20151101180122

It stands out from the other challenge patches because is a circular badge, and is the only challenge patch (besides Summer of Script (Intro to JS) and Summer of Script (Natural Simulations)) that has a circular shape. It also has a light blue color that is only used in the Chemistry (old) badge. :1

Profile that has Chemistry (old): https://www.khanacademy.org/profile/Sphairistrike/