More than 5,200 cities and towns in 135 countries worldwide switched off their lights for Earth Hour 2011 alone, sending a powerful message for action on climate change. It also ushered in a new era with members going Beyond the Hour to commit to lasting action for the planet. Without a doubt, it’s shown how great things can be achieved when people come together for a common cause. This Earth Hour 2012: 8.30pm, Saturday 31 March, celebrate your action for the planet with the people of world by switching off your lights for an hour, then go beyond the hour.

Discover where food really comes from and what it means for our health. In Food, Inc., filmmaker Robert Kenner lifts the veil on the American food industry, exposing the highly mechanized underbelly that has been hidden from the American consumer with the consent of the government's regulatory agencies, USDA and FDA.

We are the only species on earth that cooks its food - and we are also the cleverest species on the planet. The question is: do we cook because we're clever and imaginative, or are we clever and imaginative because our ancestors discovered cooking? A captivating BBC documentary about how our diet played a role in the evolution of the human brain.

The award-winning true story of third-generation American farmer John Peterson's journey of success, tribulation, failure and rebirth. Watch the free-spirited Mid-western farmer as he struggles to save his farm in the face of a declining agricultural system in America.

Here’s an experiment that shows radiation being emitted from a cell phone and reflected by pieces of popcorn, causing the phone to come apart. The type of radiation coming out of a cell phone is called non-ionizing, and is similar to that of a very low-powered microwave oven. In this demonstration, the popcorn, similar to light reflecting off a surface,  reflects the radiation without absorbing it. This then causes the cell phone to come apart. This is an interesting exercise to ‘see’ the seemingly invisible effects of radiation emitted from our cell phones.