Under the sea, the louder the better

Researchers from the Tropical Marine Science Institute at NUS have built Romanis, the world's second underwater acoustic ambient noise imaging camera that can take images of submerged structures by harnessing sound, at a 65 metre radius. The device was used to survey the reefs off the Southern Islands in August 2014. If successful, the information Romanis collects could be a key part of Singapore's efforts to save local coral reefs.

• The Sunday Times, 15 February 2015, Think, p36