Winter classes kick off today for University of Arizona students.
About 3,650 students will take 14-day quick courses, some in person and some on the Web. If you'd like to learn something new - minus the homework and tuition - you can hear from some of the UA's best lecturers on YouTube for free.
Here are three tracks to try.
• "Sweet Sorghum into Ethanol"
Plant science professor Dennis Ray takes you on a 10-minute tour of a regional pilot project to produce alternative fuels. Go to beardown.ca/ts/dx
• "Really Intelligent Computers"
Computer science department head Paul Cohen discusses 50 years of artificial-intelligence research and what's next. Go to beardown.ca/ts/dy
• "Global Climate Change: Designing Policy Responses"
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Paul Portney, dean of the Eller College of Management, reviews voluntary measures to reduce greenhouse-gas emissions and makes a case for improving electricity generation.
Go to beardown.ca/ts/dz
Contact reporter Becky Pallack at bpallack@azstarnet.com or 807-8012.
