What's the difference between these two images? On the left is a book cover by legendary artist Chris Foss for Asimov's Stars Like Dust. On the right is a painting by artist Glenn Brown, which just sold at auction for roughly $5.7 million, way more than it sold for in 2002.
How did this happen? Brown basically reimagined Foss' work — although it looks as though all he did was repaint it, and fool around with the colors slightly.
Update: I added tons more context here, and you should definitely read that second article if you want to understand what's going on.