Scientists working in Hawaii are using more sophisticated tools than ever -- like tiltmeters and thermal imagers -- to try to predict the behavior of volcanoes.

This video-enhanced lesson uses segments from the NATURE program "Ravens" to explore what scientists can determine about animal intelligence. (Grades 9-12)

Segments from NATURE's "Ravens" demonstrate indicators of animal intelligence, including communication, counting, memory, and basic problem solving.

Big Sur has attracted scientists bent on understanding this remarkable biological melting pot, where plants and animals from different ecosystems mingle side by side.

Meet the scientists featured in NATURE's "Deep Jungle: The Beast Within."

Meet the scientists featured in "Deep Jungle: Monsters of the Forest."