The Nature of Things with David Suzuki

Sable Island, Nova Scotia, is a remote, almost mythical landscape in the northwest Atlantic that's famous for its wild horses. But what many people don't know is that it's also home to the largest breeding colony of grey seals in the world. Every winter, tens of thousands of female seals head to Sable to give birth. In 2016 alone, more than 80,000 pups were born. Huge males arrive too, ready to fight for the right to breed with their chosen female.

Every day, it seems, we're fed new advice about our diets. We've been told we can't have bread, we shouldn't eat eggs and to hold the butter. As The Diet Myth author Tim Spector notes, "So what is there left to eat? Maybe a bit of lettuce."

It's the ultimate cold case. A Canadian mine operator working in the Alberta oil sands hits a hard object covered with strange spots. It turns out to be a perfectly preserved corpse that's been buried for 110 million years.

Some health experts say salt is dangerous — even deadly — while others say that it's an essential nutrient, not a vice or bad habit that we must kick.