MADISON ââ?¬â?? Several times a year, Microsoft co-founder Bill Gates heads off on a ââ?¬Å?thinkââ?¬Â retreat to look into his crystal ball.
ââ?¬Å?I ponder the ideas that people send me,ââ?¬Â Gates told more than 200 University of Wisconsin-Madison biology and computer science students Wednesday afternoon.