In the northwestern United States, this crayfish would be just a friendly bit of local fauna. But in Scotland, it's an invasive species wreaking havoc on trout streams. Ari Shapiro/NPR hide caption

itoggle caption Ari Shapiro/NPR

The face in Jorge Rodríguez-Gerada's larger-than-life portrait is a composite of photos the artist took of young men from many racial backgrounds. Tami Heilemann/Department of the Interior hide caption

itoggle caption Tami Heilemann/Department of the Interior

The Royal Shakespeare Company is releasing albums of the music commissioned for its productions of many of the plays in this first collected edition of William Shakespeare's works. Leon Neal/AFP/Getty Images hide caption

itoggle caption Leon Neal/AFP/Getty Images

British Prime Minister David Cameron speaks with campaigners against female genital mutilation at the Girl Summit in London in July. Oli Scarff/Getty Images hide caption

itoggle caption Oli Scarff/Getty Images

Scotland lowered the voting age to 16 for Thursday's referendum on whether to remain part of the United Kingdom or opt for independence. It was widely assumed the teenagers would overwhelmingly vote for independence, but that doesn't appear to be the case. Scott Heppell/AP hide caption

itoggle caption Scott Heppell/AP

A tourist wears a poncho decorated with the national flag of Scotland to shelter from the weather in Scotland's capital, Edinburgh, on Monday. Matt Dunham/AP hide caption

itoggle caption Matt Dunham/AP

Elijah, the Woodford Reserve Distillery mascot cat in Versailles, Ky., in 2013. He kept the workplace mouse-free for more than 20 years before dying this summer, the distillery said. Charles Bertram/Lexington Herald-Leader hide caption

itoggle caption Charles Bertram/Lexington Herald-Leader