Bears went on a fishing expedition which failed. They dumped into thin books, trying to pressure the market down by making new lows. Buyers snapped price back like a rubber band, driving price right back where it came from. That squeezed the bottom shorters, who are scrambling to close their losing shorts now. This kind of action is called a "short squeeze."
In reality what happened is, some idiots tried to influence the price, fucking failed. Some whale or a bull didn't want the dip to be a success so he risked his money. Or people just collectively came together and bought bitcoin(yeah right!). 
Probably the best recovery in the history of Bitcoin.
No. Definitely not. This recovery was hardly a recovery. The price shot up only by a couple hundred dollars, not a big difference.