Teen solves Newton's 300-year-old riddle

There's a follow-up here: http://news.ycombinator.com/item?id=4034487

This to accompany some previous submissions:

* http://news.ycombinator.com/item?id=4028756

* http://news.ycombinator.com/item?id=4029599

* http://news.ycombinator.com/item?id=4029676

* http://news.ycombinator.com/item?id=4031332

* http://news.ycombinator.com/item?id=4031625

* http://news.ycombinator.com/item?id=4034225

* http://news.ycombinator.com/item?id=4046994

Consensus seems to be that he's found a closed-form solution of a 2D projectile with friction proportional to the square of the velocity:

* http://www.reddit.com/r/worldnews/comments/u7551/teen_solves...

* http://math.stackexchange.com/questions/150242/teenager-solv...