
Did you watch the first part of David Attenborough's documentary on the Great Barrier Reef?
This is a remarkable documentary with filming ending just as the reef was undergoing massive coral bleaching due to exceptionally warm waters caused by climate change. This is the third global coral reef bleaching event on record.
Attenborough first visited and documented the reef 60 years ago. Part one of the three part series contains an allegorical story from the Cairns area about sea level rise from the aboriginal dreamtime.
The Great Barrier Reef, geologically speaking, is a relatively recent phenomena. Sea levels were 70 to 90 metres lower during the Ice Age period with a narrow and steep shoreline where the east coast of Australia fell sharply to deeper waters. Sea levels started to rise at the end of the last ice age about 14,000 years ago.