You guys may or may not know Hank Green -- 1/2 of the video-blog YouTube phenomenon Vlogbrothers, and the brother of John Green, novelist and former flosser. In the last few years, Hank's taken to writing songs every few weeks for his YouTube audience, and they were so popular he actually released them last year in an album called So Jokes. (You can find it on iTunes.) Anyway, many of his songs are full of nerdy facts that seem just right for the mental floss audience, so I thought I'd share a few with you here. If you like They Might Be Giants, you'll probably dig Hank.

"Strange Charm" is a song all about Quarks!

Likewise, here is a song about protons and neutrons.

Where are all the aliens that should be here? Hank explores that very question in "The Fermi Paradox."

Phineas Gage is a popular historical figure here on the floss -- he's that guy from the 1800s who got a railroad spike through the head and lived to talk about it -- only the brain damage he sustained made him really angry.

This song is full of facts -- about poop. Hank suffers from ulcerative colitis, which he recounts in somewhat gory detail here.

Hank and his musically-inclined friends also like to rock out to current events news.

For all you Harry Potter geeks out there, one of Hank's most popular songs ever is called "Accio Deathly Hallows."

Unlike most of Hank's songs, this one is a bit less fact-y and a lot more heartfelt.