Science

Detweiler was surprised to learn she wasn't eating enough to fuel her training regimen. As an athlete, doctors and nutritionists say, she needed more food variety and more calories — three snacks daily, as well as bigger meals. Courtesy of Nationwide Children's Hospital hide caption

Delegates took their seats during the plenary session at the Bonn climate change conference on March 10, 2014. Negotiations resume this week; by the end of the year, the U.N. hopes to have forged a new global agreement. UNclimatechange/Flickr hide caption

Two octopuses going at it — or, as marine biologist Peter Godfrey-Smith might put it, engaging in a bit of "ornery" behavior. Peter Godfrey-Smith (CUNY and University of Sydney), David Scheel (Alaska Pacific University), Stefan Linquist (University of Guelph) and Matthew Lawrence. hide caption

California condors have enormous wingspans. That's fine in the wilderness, but when a bird of this size encounters a power line, the results can be fatal. The San Diego Zoo Safari Park has a program to help train birds to avoid the hazard. Jon Myatt/U.S. Fish and Wildlife Service/Flickr hide caption

Professor Douglas Causey logs information as he tags and takes basic measurements of the birds he harvested in the Aleutian Islands on June 4. He is looking at the birds' blood and their diet, hoping to find out the ways the ocean is changing as it warms. Bob Hallinen/ADN hide caption