Researchers found numerous ring-like structures inside France's Bruniquel Cave. They believe they were built by Neanderthals some 176,000 years ago. Etienne FABRE - SSAC hide caption

Avigdor Lieberman, who became Israel's new defense minister this week, visits Jerusalem's Old City on March 9. Lieberman's hard-line positions and controversial remarks have ignited fierce debate in Israel and beyond. Mahmoud Illean/AP hide caption

Andrew Heineman's twin brother, Marcus, pulls a cultivator across a different field where they will plant seed corn this year, another alternative they selected when the price of corn started to fall and a new seed corn plant opened up nearby. Amy Mayer/Harvest Public Media hide caption

Moby's new memoir, Porcelain, is a tale of dance clubs, DJs, and New York City in the 1990s. Courtesy of the artist hide caption

Sen. Elizabeth Warren at a news conference earlier this year urging Senate Republicans to confirm President Obama's Supreme Court nominee. Chip Somodevilla/Getty Images hide caption

Feral hogs in Great Smoky Mountains National Park are an invasive and hugely destructive species. Courtesy of Bill Lea hide caption