Quote of the day
Nothing is impossible in this world. Firm determination, it is said, can move heaven and earth. Things appear far beyond one's power, because one cannot set his heart on any arduous project due to want of strong will.
Robert S. Siegler

Born: May 12, 1949 (age 75)
Bio: Robert S. Siegler is an American psychologist and Teresa Heinz Professor of Psychology at Carnegie Mellon University. He is a recipient of the American Psychological Association's 2005 Distinguished Scientific Contribution Award.
Known for:
- How Children Develop (2006)
- Emerging minds (1996)
- How Children Discover New Strategies (1989)
- Children's Thinking (1991)
- Das Denken von Kindern (2001)