"Tickling The Dragon's Tail"
This is a recreation "tickling the dragon's tail," the procedure Slotin was demonstrating when the screwdriver slipped and released a fatal dosage of radiation. It shows the configuration of beryllium reflector shells prior to the criticality. United States Department of Energy, via Wikimedia Commons
Scientists collected poop from two pandas at the Memphis Zoo (including Le Le, above) and investigated its microbial community. Candace Williams

This is the text of my first article!