Today's post is brought to you by the letter 'p' and the number '4'

P: perodactyl, not to be confused with the more common pterodactyl: a little known prehistoric creature which carried a jar of coffee substitute in its fingers at all times hence the name Pero (a brand of coffee substitute) and -dactyl (from the Greek for 'finger'.) How it was determined that it carried Pero, or how Pero could possibly have existed in the Jurassic, are not known, although some commentators have speculated that it may be related to the appearance of Mark Twain before Congress in 2006, as documented in a blog post I've now lost track of. Skeptics who say I didn't read it correctly or that the post had a typographical error are invited to read the post themselves.