Coral reefs are the only structures made by a single living organism (apart from humans) that you can see from space, and they are the most diverse and productive ecosystems out there. In this episode of Talk That Science, dr. René van der Zande and Sarah Solomon MSc explain how coral reefs are formed, how corals function and how they are affected by climate change.

The tracks played during the episode:

1. Andrean Sand Dunes, by Drexciya

2. Sea Swallow Me, by Cocteau Twins, Harold Budd

3. Seaweed, by Tindersticks

4. Diving, by Bombay Bicycling Club, Holly Humberstone