It is springtime in Alaska, and the U.S. Geological Survey team is
gearing up for polar bear capturing. The scientists locate bears from a
helicopter, tranquilize them, give them tattoo ID numbers and tags, and
collect data such as height, weight, and body fat measurements and
samples such as blood, hair, feces, and even teeth. For more than
forty-five years, scientists have been capturing bears in order to get
information. What has this information been telling scientists about
polar bears and our changing global climate? Find out in this
fascinating entry in the Scientists in the Field series!