"Jack Dumbacher, researcher at the California Academy of Sciences, discusses his 1980s discovery of New Guinea's Hooded Pitohui, the first poisonous bird to be documented by science."

From the documentary film "Nuclear Boy Scout", the true story of the boy who set out to build a nuclear reactor in his garden shed. The complete documentary is available on DVD from producer@eagletv.co.uk

"Today's math curriculum is teaching students to expect -- and excel at -- paint-by-numbers classwork, robbing kids of a skill more important than solving problems: formulating them. At TEDxNYED, Dan Meyer shows classroom-tested math exercises that prompt students to stop and think."

"In this bracing talk, coral reef ecologist Jeremy Jackson lays out the shocking state of the ocean today: overfished, overheated, polluted, with indicators that things will get much worse. Astonishing photos and stats make the case."

"Think of the ocean as our global savings account -- and right now, we're only making withdrawals, not deposits. Enric Sala shows how we can replenish our account through no-take marine reserves, with powerful ecological and economic benefits."

William Li presents a new way to think about cancer treatment: angiogenesis, targeting the blood vessels that feed a tumor. The crucial first (and best) step: Eating cancer-fighting foods that beat cancer at its own game.

Your principal incentive to recycle? That one's a no-brainer: the environment, of course. But, it doesn't just have to be a green act of good will; it can add a little extra cash to your wallet as well. Recycling for money sure won't make you a millionaire, but these days every penny counts. So, cash in on your good conscience with these items.

In a perfect world, you could enjoy great sound by installing just four full-range speakers - one in each corner of your car. In the real world, things aren't quite that easy. Full-ranges simply aren't up to the task of accurately reproducing the entire music spectrum. That's why top-notch systems employ two or more component speakers - like a woofer and tweeter - per channel. Each component is designed to reproduce a specific range of frequencies, and together they can cover the entire music spectrum accurately.\n\nA complication arises, however, since source components such as CD players deliver all of these frequencies - low, high, and in between - as a single music signal. This is where crossovers come in. A crossover divides the music signal into frequency bands that are compatible with the different types of component speakers.

Want to see a real sugar high? Launch a model rocket with Oreo cookies

Fun, interactive, research-based simulations of physical phenomena from the PhET project at the University of Colorado.

"The upper layer of the world's ocean has warmed since 1993, indicating a strong climate change signal, according to a new study. The energy stored is enough to power nearly 500 100-watt light bulbs per each of the roughly 6.7 billion people on the planet."

"Historically, scientists have focused on breeding useful traits such as disease resistance from African rice into Asian rice. Now the focus is on the reverse -- using African rice as the basic crop and improving it with Asian genes. "African rice was initially ignored by mainstream research," said Koichi Futakuchi, a scientist at Africa Rice Center (AfricaRice) in a statement."

"Scientists have found vast underwater plumes of oil, one 10 miles (16km) long and a mile wide, in the Gulf of Mexico, following last month's rig disaster."

"Cells grown in microgravity generate problematic proteins (absent in normal stem cells) that play a role in bone deterioration."