If you've ever seen a group of starlings in flight, you've appreciated one of nature's most hypnotic sights -- the lava-lamp-like flow of a murmuration. SciShow explains the biology and mathematics behind this beautiful phenomenon.

Whether they're belting Beyoncé, head-banging to classic rock, or rattling off curse words at zoo-goers, parrots are constantly astounding us. They are among the only animals that produce human speech, and some parrots do it almost...

Clouds manifest moisture condensed in the air. In this program they are appreciated and pondered. Clouds give clues to wind direction, humidity levels, weather patterns, and they just make pretty sights. We look at the basic type of...

Brothers Arun and Anoop George from Kerala, south west India, are hoping to revolutionise the renewable energy market with a small wind turbine that costs around $750 USD (670 EUROS).



...

A farmer in Lower Branch, N.S., had to destroy hundreds of birds after avian flu was spotted on her farm. Avian flu poses no threat to humans, but is highly contagious among birds. Preston Mulligan has the story.

A Quebec poultry farmer is taking extra precautions to protect his livelihood and livestock as the province grapples with avian flu outbreaks that have killed almost one million birds in the past year.

With fewer hatching eggs available, people who raise meat chickens north of the border are scrambling to find a new supply of chicks. Erin Pottie has the story.

Footage from the Melness area, in the Highlands of Scotland, during the return of the sheep after grazing in their sheds. The film closes with a handwritten inscription that warns visitors "Beware of lambs, they bite".

B&W. 1940s. Devon. Two men with binoculars. They sit by river. Sheep in a large pen. High shot looking into buildings in valley. Man with binoculars looking at cliff sides. Man on horseback out of farm followed by a dog. Woman chopping...

Lairg is a village and parish in Sutherland, in the area of the Highlands in Scotland. The film begins with footage of the Shin River, that is flowing alongside the Lairg. We can see the many layers of the river which create small...

Background to story: In a tiny French village on the Spanish border, a handful of

people still practise a whistled language. They maintain a formerly wides
pread
tradition that's survived for
centuries.
Film: Rev...

The Department of Agriculture says the bird flu has turned up in commercial and backyard flocks in 29 states, affecting more than 33 million birds.