"I knew right from the minute we dropped in that it was something special," conservationist Sophie Kalkowski-Pope said.

A mother-and-daughter team of citizen scientists has identified the world’s largest known coral colony, found on the Great Barrier Reef off the coast of Australia.

One of the most confounding mysteries from the early days of this nation has finally been solved after 435 years – researchers say they have located the so-called Lost Colony of Roanoke.