[ics]

IIRC Erik Demaine (https://en.wikipedia.org/wiki/Erik_Demaine) started teaching at 20 and had his PhD. I can't remember if I first saw his name because of the MacArthur Grant or one of those science documentaries but one of his pages was on the frontpage here a week or two ago and it seems like he's been thriving.

[daxfohl]

Noam Elkies too, the youngest ever tenured prof at Harvard. Another parallel he had a pretty famous contradiction proof, of Euler's conjecture. But he didn't find that until age 22, so seems like this girl has a good head start!

[ekaryotic]

theodore kacsynski started teaching at 22. a damn bright spark before he was victimised by the mind control experiment.

[lupire]

Kasynski got his masters degree at 22, which just slightly younger than average.