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.
Kathy Niakan, a developmental biologist at the Francis Crick Institute in London, used the CRISPR gene editing technique to find out how a gene affects the growth of human embryos.
Courtesy of The Francis Crick Institute
The first sign of successful in vitro fertilization, after co-injection of a gene-correcting enzyme and sperm from a donor with a genetic mutation known to cause hypertrophic cardiomyopathy.
Courtesy of OHSU
Colored scanning electron micrograph of baker's yeast, conventionally grown in the lab. So far, researchers have been able to synthesize six of the yeast's 16 chromosomes from scratch, and think they may be able to complete all 16 by 2018.
Dennis Kunkel Microscopy/Science Source