He rocks that threehead but why does this dude think he's a musician or whatever?

The jury is still very much out on arsenic based life. It's not a "huge deal" at all to the vast majority of scientists as the study that claimed arsenic can be incorporated in DNA was simplistic and flawed. Most molecular biologists (including myself) don't believe the finding at all. Many prominent scientists have publicly attacked the study, and rightfully so. Shame that it is now making it's way unfiltered into the mainstream.