Last week, one of the biggest news stories swirling out there was about 20-year-old Dylan McWilliams, who was attacked by a shark, just one year after being attacked by a bear.
Both animal attacks, of course, are very rare, so astrophysicist Ethan Siegel put his big brain to work to figure out just how lucky -- or unlucky -- Dylan was.
The odds of Dylan being bitten by a shark while surfing in Hawaii were 1-in-200,000.
And, considering how much time Dylan was hanging out in the woods of Yellowstone National Park, his odds of a bear attack were quite a bit higher -- 1-in-2,600.
So, the total odds that Dylan would have both things happen to him were around 1-in-500,000,000, which is close to the same odds of winning the Powerball.
You could argue that the odds should actually be higher because he SURVIVED both attacks.