'Living concrete' covers buildings in moss

To some people, a lichen-covered facade is an evocative sign of history; to others, it's a mess. But to a team at the Universitat Politècnica de Catalunya, it's a way of regulating buildings' temperature and improving air quality.

Lichen shown to survive in outer space

An experiment carried out on the Internatonal Space Station has shown that lichen can survive in outer space - lending support to the 'panspermia' theory that life arrived here from elsewhere.