How the Earth Made Us
Iain travels to the Naica Cave in Mexico, where he and his crew battle 50°C temperatures and 100% humidity to bring remarkable footage of the world’s largest crystals, in a deep underground cavern. It’s phenomenal stuff.
[update 20th Jan: 3.5 million viewers! The highest figures for a science programme on BBC2 in four years, according to the Guardian. Fantastic news — congratulations Iain!]