Swimming holidays are the ultimate in slow travel – and since the pandemic, they've become more popular than ever.

ISLA: Dundee! We’ve travelled nearly 188 kilometres! Soon we’ll pass through the river’s mouth and out to sea. CONNOR: The river gets really wide here doesn’t it. Bleurgh. And salty!

Stunning discoveries and fresh breakthroughs in DNA analysis are changing our understanding of our own evolution and offering a new picture of the "other humans" that our ancestors met across ...