Orcas in British Columbia; great white sharks in Cape Cod Mass.

Researchers study category five hurricanes; tornado trackers hunt for a twister; how wind causes lightning to form; a mountain where the fastest winds in the Northern Hemisphere have been recorded.

The winner of the third Student Explorer Contest; Philippe and the lucky student head to Hawaii to meet with conservationist Ocean Ramsey where they swim with sharks three miles off-shore in their natural habitat.

A facility that makes biofuel for United Airlines aircraft; kelp farming in Maine; plastic waste reduction at the University of Pennsylvania; ways solar technology has advanced.

How karst rock has led to the formation of over 12,000 caves across the country of Slovenia; why Slovenia is a global leader in sustainability.

Animal rescue centers; coming to the aid of orphaned harbor seals; illegally caught gibbons are rescued in Thailand; help for an orphaned baby anteater in Panama; a family runs a rescue center for kiwi birds.

How water is the backbone of energy and resources in different areas across the planet.

Researchers fight invasive plants, animals and materials in native habitats.