The NY Times reports that undergraduate enrollments in computer science programs are back up. The explanation: competing alternatives for people with the required skill set have gotten less attractive. Investment banking is no longer luring people away. It's further supporting evidence for Richard Freeman's work on how numbers fluctuate in different careers - people on the margin between options are influenced by the relative attractiveness of different career paths. If you want more people to go into science, it's essential to make science attractive as a career.