Forest Foe

The mighty oak tree can live up to 250 years. So what was ravaging the forests of California, killing trees from the inside out? Scientists call the phenomenon Sudden Oak Death and now they know what causes it.

Mars Attracts

Your mission, should you choose to accept it: travel 300 million miles searching for signs of life on a planet so extreme that you will succumb to its elements within 3 months. That’s the story of robotic explorers known as rovers, who probe the surface of Mars on a geology field trip like no other.

Tennessee Trunks

A tire-store living mascot. A former big-top performer. A zoo cast-off. These are some of the elephants who have found their way to a unique sanctuary in rural Tennessee. It’s part refuge and part retirement home and this lucky reporter made a visit.