Great Barrier Reef will never be as pristine as it once was: scientists

By Colin Packham
SYDNEY (Reuters) – Parts of Australia’s Great Barrier Reef will never recover from the impact of unseasonably warm waters, scientists said on Thursday, as more of the World Heritage Site comes under renewed threat from a recent spike in sea temperatures.
Warm seas around the reef killed some two-thirds of a 700 kilometer (496.4 miles) stretch of coral last year after warm water caused the coral to expel living algae, triggering it to calcify and turn white, a proces