Im not exactly a spring chicken these days, but I collect old books on certain subjects and have since developed a mild (but worrying) interest in how grammar and spelling has changed over the years. Most of the books from early WWII or before spell it as to-day, but by 1945 most had moved to today (and, equally, to-morrow to tomorrow). The earlier spelling persists into the early 1960s, but increasingly less so. Not that theres anything wrong with either (or any) spelling as long as the meaning is clear.
Anyhoo, on thread I think Hawking used to spell it as puff, puff puff, puff, puff, but removed the hyphen and now spells it as glance twice, dribble a bit.
You know he's not a scientist, don't you? He is actually the dribbling mindless zombie he appears to be. He's the puppet of an evil mediocre scientist in need of a gimmick on account of not being brilliant.
So he's actually remotely controlled from behind the curtains.