Elation is an Angus bull that recently sold for $800,000. His co-owner, Brian Bell, sells Elation's semen for $50 a sample, about double the going rate.
Kristofor Husted/Harvest Public Media
Joseph James DeAngelo, who authorities suspect is the so-called Golden State Killer responsible for at least a dozen murders, is arraigned in Sacramento, Calif., on Friday.
Colored transmission electron micrograph of a section through an Escherichia coli bacterium. This rod-shaped bacterium moves via its hair-like flagellae (yellow).
Kwangshin Kim/Science Source
What scientists believe to be our oldest ancestor, the single-celled organism named LUCA, likely lived in extreme conditions where magma met water — in a setting similar to this one from Kilauea Volcano in Hawaii Volcanoes National Park.
Danita Delimont/Getty Images/Gallo Images
Ben and Tara Stern relax at home in Essex, Md. Ben was diagnosed with glioblastoma in 2016. After conventional treatment failed to stop the tumor, Ben tried an experimental drug.
Volunteer Greg Ruegsegger is outfitted with monitors, a catheter threaded into a vein and a mask to capture his breath in an experiment run by Joyner to measure human performance.
Martha (right), the last known passenger pigeon, died in 1914. Her preserved body is now on display at the Smithsonian's National Museum of Natural History in Washington, D.C.