Workers at the National Geographic Museum in Washington grind the rough edges off a life-size replica of a spinosaurus skeleton. Mike Hettwer/National Geographic hide caption

itoggle caption Mike Hettwer/National Geographic

Visitors watch an orca performance at SeaWorld in San Diego this year. The company has seen attendance slip in the year since the release of a documentary film critical of the company's captive whale program. Mike Blake/Reuters/Landov hide caption

itoggle caption Mike Blake/Reuters/Landov

To refrigerate or not to refrigerate? It boils down to bacteria, aesthetics and how much energy you're willing to use. Robert S. Donovan; Flickr / Alex Barth; Flickr hide caption

itoggle caption Robert S. Donovan; Flickr / Alex Barth; Flickr

"The State of the Birds" 2014 report found that red knots (above) and other shorebirds are among the most threatened groups in the U.S. More than half of U.S. shorebird species are on the report's Watch List — species that are currently endangered or at risk. Gerrit Vyn/The Smithsonian Institution hide caption

itoggle caption Gerrit Vyn/The Smithsonian Institution

A Baltimore oriole perches near apple blossoms in Mendota Heights, Minn. Universal Images Group via Getty Images hide caption

itoggle caption Universal Images Group via Getty Images

A box of chicken eggs painted to look like marbled murrelet eggs. The eggs contain a chemical that induces vomiting. Scientists are trying to teach the endangered bird's predator, a type of jay, to avoid murrelet eggs. Lauren Sommer/KQED hide caption

itoggle caption Lauren Sommer/KQED

Across Washington State, hydroelectric dams are blocking salmon as they migrate to their spawning grounds. Enter the salmon cannon. Ingrid Taylar/Flickr hide caption

itoggle caption Ingrid Taylar/Flickr