The Oregon-born wolf known as OR93 near Yosemite, Calif. in February 2021. The wolf thrilled biologists as it journeyed far south into California, but was found dead after apparently being struck by a vehicle. California Department of Fish and Wildlife via AP hide caption

Scientists at Pfizer's research and development laboratories in Groton, Conn., worked on the COVID-19 pill called Paxlovid. Stew Milne/AP hide caption

Carolyn DeFord is pictured with her daughter and mother, Leona Kinsey, in La Grande, Ore., in their last photograph together before Kinsey disappeared in October 1999. Carolyn DeFord hide caption

The planet-hunting telescope TESS depicted in front of a lava world orbiting a small red star. NASA's Goddard Space Flight Center hide caption