The Utah Avalanche Center's Chad Brackelsberg and Trent Meisenheimer talk about the science of a spring snowpack...when it is record-breaking? What happens to the slowly eroding snow? When is it hazardous? How late into the season will we see avalanches? (1:14) Then, Jason Sills of the Clark Planetarium talks about stargazing over the last 20 years and the upcoming 20th-anniversary celebration. (30:44)