Scientists have revealed that the Pacific reefs are in critical danger as the region enters its hottest months of the year. Four years ago a heatwave killed up to half of Hawaii's corals, now early signs of coral bleaching have reached the island's most remote shorelines, a sign that another catastrophic event could be on its way.
With "My Queue" you can quickly save videos to watch later.
To add an item to your queue just click the sign next to the video.
Once you've added a video visit "My Queue" to start watching!