tag:bbc.co.uk,2008:cps:playlist:story:8043624 Underwater burials breed new life Families in the US are using their loved one's ashes to build artificial reefs which are dropped into the sea as a new home for marine life. 2009-05-12T06:01:06Z News 8043624 38263 true tag:bbc.co.uk,2008:cps:advert:story:8043624 tag:bbc.co.uk,2008:cps:ident:news:video:512x288 tag:bbc.co.uk,2008:cps:story:8043624 tag:bbc.co.uk,2008:cps:playlist:story:7945138 Coral reefs to 'disappear' Coral reefs may begin to disappear within 50 years, according to the latest research. tag:bbc.co.uk,2008:cps:playlist:story:7935821 Diving on a coral nursery Scientists are concerned about the possible effect of ocean acidification on marine life. To find out more about coral reefs Roger Harrabin dived down to a nursery in the Red Sea.