Ever wonder how the heart symbol came to stand for the actual heart? And why do we speak of the heart as the seat of love, when love really happens in our brains? Is it true that animals only get a billion heartbeats? This week, we give you enough cool cardiac science to make your heart skip a beat.
Why do we sleep? We spend a third of our lives in slumber, but science has yet to determine exactly why we have do it. Here’s a look at how sleep works, why we’re not getting enough sleep, what happens if you DON’T sleep, and an idea about where sleep came from in the first place.
2015 • Health
The Great Butterfly Hunt tells the story of incredible journeys. The first is that of the remarkable Monarch migration, which is the longest insect migration on Earth, is. The second story is that of Fred Urquhart, the determined Canadian scientist who spent 40 years trying to discover exactly where the butterflies mysteriously disappeared when they flew south for the winter. The Great Butterfly Hunt is a beautiful and colourful one-hour program that combines the spectacular visuals from Flight of the Butterflies with the production’s behind-the-scenes look at how such films get made. On Thursday, January 2, when many Canadians will be groaning about the long grey winter ahead, The Great Butterfly Hunt will remind audiences of the promise of spring. And, at a time when the monarch population is in rapid decline, viewers will have an opportunity to watch one of Nature’s most dramatic feats unfold.
In the high Himalaya, yak-herder Thokmay Lowa and his small group steer his herd through one of the region's extreme mountain passes. For several months of the year, In the Canadian Arctic, traditional Inuit communities still forage for much of their food. 63-year-old Minnie Nappaaluk and her granddaughter Eva embark on one of the most hazardous expeditions for food Some Natural Wonders are threatened as never before - nowhere more so than the Brazilian Amazon. In the Mato Grosso, as a result of deforestation, the region's microclimate has changed. Now fires rage out of control in the dry season.
In the first episode and for the first time ever, the programme compares the humble moggy with their big cat cousins, gaining surprising insights into the entire cat family. In Africa, lion whisperer Kevin Richardson proves how similar domestic pets are to the fearsome big cats and why there's more to feline communication than meets the eye. In the thick jungles of South East Asia, the series discovers which sabre-tooth wild cat has given tabbies their gravity defying climbing skills and in Namibia, shows how a strange looking cat called a caracal has given them the ability to jump over three metres and catch birds in flight, inspiring the phrase "put the cat amongst the pigeons". To truly understand the world’s most beloved purring pets, there needs to be an understanding of their wild relatives.