Coral lichen on a tree in Newfoundland. This lichen has been demonstrated to usefully discriminate between old-growth and second-growth forests in Nova Scotia, Canada. Credit: Troy McMullin There aren ...

Lichens grow practically everywhere, but they have been neglected by scientists for years, says James Lendemer, a lichenologist with New York Botanical Garden. Lendemer took Science Friday on a trip ...

Like small signposts, these curious organisms can tell us a lot about the air we’re breathing. Fresh, clean air is wonderful to breathe in. Without the health risks of air pollution, fresh air feels ...