U.S. Fish and Wildlife Forensics Lab Director Ken Goddard holds a wood sample used in the lab's forensic work in Ashland, Ore. Jes Burns/OPB/EarthFix hide caption

itoggle caption Jes Burns/OPB/EarthFix

Family means a lot on Cayo Santiago, an island and monkey research colony off the coast of Puerto Rico. The colony of rhesus macaques living on the island since the 1930s has allowed scientists to trace kinship ties and effects across an extended community. Anders Kelto/NPR hide caption

itoggle caption Anders Kelto/NPR

An illustration of Pappochelys, based on its 240-million-year-old fossilized remains. This ancestor to today's turtle was about 8 inches long. Rainer Schoch/Nature hide caption

itoggle caption Rainer Schoch/Nature

AquaBounty's salmon (background) has been genetically modified to grow bigger and faster than a conventional Atlantic salmon of the same age (foreground.) Courtesy of AquaBounty Technologies, Inc. hide caption

itoggle caption Courtesy of AquaBounty Technologies, Inc.

This undated photo from the San Diego Zoo shows Speed, a Galapagos tortoise that has been at the zoo since 1933. The zoo reported Friday that Speed had been euthanized at an estimated age of more than 150 years. AP hide caption

itoggle caption AP

Troy Capps found deer antlers in central Oregon's backcountry. Capps is a co-founder of Oregon Shed Hunters, a group that promotes ethical shed hunting. Courtney Flatt/Northwest Public Radio hide caption

itoggle caption Courtney Flatt/Northwest Public Radio

A Maasai boy and his dog, near the skeleton of an elephant killed by poachers outside of Arusha, Tanzania, in 2013. Jason Straziuso/AP hide caption

itoggle caption Jason Straziuso/AP