Nathalie and Jim get up close and personal with tiger and lemon sharks, trying to get the best footage while taking care not to disturb or excite the dangerous animals.

In this second of two segments, learn about the alternatives to bottled water and what you can do to help protect our environment.

In this episode, Doc Gruber and a colleague are testing a shark repellent. If effective, it could help save the lives of divers, swimmers and surfers all over the world.

peta2: At only 16 years old, Tia Blanco is already one of the top women surfers in the world. Learn how her vegan diet has helped Tia surf her way to the top!

Here's some more stunning underwater footage. This time it's hammerhead sharks and stingrays, a wahoo and some striped eels, all filmed near the Cocos Island in the Caribbean. Take a look!

The trailer for this documentation shows the mistreatment of sharks by humans. We are reminded that sharks also form a part of nature and as such play an important role and need to be protected.

Samuel Gruber's team films white-tipped sharks and barracuda feeding at night off Cocos Island. Enjoy!

"Help us to complete development of the Ocean Energy Turbine designed to replace Fossil Fuel and Nuclear Energy Dependence." Back this project and make the world a better place.

A British Gas video featuring Amanda Lamb with tops tips on preparing your home for the winter, including information on bleeding radiators, insulating pipes, and checking boiler pressure.

Eco the Butterfly stars in this 60-second spot now airing on some PBS television stations. It made its debut on PBS affiliate WXXI in Rochester, NY.

In lieu of Earth Day, educational videos for kids are being scoured by Earth Day supporters hoping to teach their children about going green. Earth Day however, is being approached more stringently by radical Earth Day supporters, who say that in order to save the planet, people should stop having kids. Whose side are you on?

Sam Gruber's team of biologists capture, tag and release a juvenile tiger shark. Then they track it electronically into the mangroves, an ideal location for their research.

Arctic sea ice is a key component of our global climate system. Scientists have observed that our polar ice is melting at an alarming rate. Dire consequences may ensue for man, beast and our planet as a whole, if we don’t move to alternative non-fossil sources of energy. View this informative video from Greenpeace.

Gruber's team of researchers work day and night. In this episode they record a shark's vital statistics while it's in a state of tonic immobility. Before releasing it, they take a DNA sample. Enjoy!

The team's divers conclude their filming and come back to the surface unharmed. We learn more about current developments in the prevention of shark attacks.