As spring arrives, the remarkable and deadly poisonous Sierra newt moves to its traditional aquatic breeding grounds. Meanwhile, kingfishers fish the crystal clear Yosemite streams and squirrels play a dangerous game of chase with the hunting bobcats.

Molten granite was cooled and scoured by glaciers, forming Yosemite’s almost surreal landscape with its many remarkable rock formations. Black bears inhabit the park and emerge each spring from their hibernation, ready to begin a new cycle of life.

Audio and video sources can be factual, and can be used as evidence, but they can both be doctored, too. When we don't have the facts, we might have hearsay, but can we trust it?

What's the difference between disinformation and misinformation? And what about misleading information? Find out in this video.

Protected by presidential decree, the breathtaking mountainous terrain of the Yosemite Valley is now a national park, enjoyed by many human visitors, while still home to the wild creatures and stunning vegetation that has inhabited it for millennia / centuries.

Isaac and his dog, Bucket, are our guides for a road trip across the great open landscape that forms the United States of America. From vast swathes of Kansas farmland and Colorado’s Rocky Mountain ranges to the expansive salt flats at Bonneville, we’re certainly getting a taste for the open road!

Sigrid talks about the reality of conversing with someone who has Alzheimer's. They often have trouble finding the word for the thing they are thinking of.

Nigella finishes her recipe for poached peaches full of pink syrup and fabulous summer flavor!

Nigella's poached peaches are perfect for summer, and also great if you don't have access to very ripe peaches due to the season or your location.

Sigrid describes traveling from her home in Italy to Tacoma, Washington in the United States to care for her sister with Alzheimer's disease. She stayed there for a whole month.

A coyote and a golden eagle fight over the carcasses of animals that did not survive the frozen winter, and a mother bobcat teaches her kittens to hunt through the snow.

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What's the difference between "clean" and "dirty" energy? Sigrid reports on different kinds of energy and discusses trends in heating our homes.

Isaac hikes to visit a waterfall in Canada’s Fundy National Park. The wooded and rocky park is at the end of the Appalachian mountain range and has a shoreline on the Bay of Fundy, which has some of the most dramatic tides in the world.

Abi reads extracts from a version of Clement Clarke Moore’s famous Christmas poem, popularly known by its first line “’Twas the Night Before Christmas,” about a father who witnesses the visit of Santa Claus on one magical Christmas Eve.