Panthers roam in rural Collier County, in southwest Florida. As the Florida state animal's population has grown, wildlife officials may seek to take the panther off the endangered species list. Courtesy of the Conservancy of Southwest Florida hide caption

itoggle caption Courtesy of the Conservancy of Southwest Florida

NOAA scientists estimate they saw about 10 billion sea scallops off Delaware and southern New Jersey this spring as part of an annual survey. Andrew Martinez/Science Source hide caption

itoggle caption Andrew Martinez/Science Source

This is a calculated flood map for the city of St. Louis. Water depth goes from deep (dark blue) to shallow (white, light blue). Floodwater can come from the Illinois, Upper Mississippi and Missouri rivers, as well as from heavy local precipitation. Courtesy of Dag Lohmann/Katrisk hide caption

itoggle caption Courtesy of Dag Lohmann/Katrisk

A plume of steam billows from the coal-fired Merrimack Station in Bow, N.H. in January 2015. Jim Cole/AP hide caption

itoggle caption Jim Cole/AP

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

One of the 20 GPS sensors deployed on Greenland's Helheim Glacier to track its movement. Alistair Everett/Swansea University hide caption

itoggle caption Alistair Everett/Swansea University