"240-Year-Old Nautical Maps Show Coral Loss Is Much Worse Than We Knew"
"Between 1773 and 1775, George Gauld, a surveyor with the British Admiralty, immortalized the coast of the Florida Keys in ink. ... Gauld also took note of the corals he saw. And in doing so he created the oldest known records of Florida reefs. A stark picture of shrinking coral emerged: Half of the reefs recorded in the 1770s are missing from the satellite data."