"We found that newborn sharks captured in the mid-1990s left the safety of the islands when they were between five and eight years old," explained Dr Kevin Feldheim, the A. Watson Armour III Manager of the Pritzker Laboratory for Molecular Systematics and Evolution at The Field Museum and the lead author of the study.

Yet, despite leaving and visiting many other islands in their travels, these sharks 'remember' where they were born after a decade of roving, and are able to find the island again when they are pregnant and ready to give birth," Dr Feldheim added.

Indonesian divers have discovered the wreck of a WW2 Nazi U-boat, with 17 skeletons of its crew still aboard. A tip-off from local divers led a team to the wreck, located 100km northeast of Karimunjawa Island off Java.

U-168

Initial research concluded the sub to be  U-168, a hunter-killer of the German 'Kriegsmarine' that claimed several Allied vessels before being sunk by torpedoes in 1944. Numerous artefacts were also recovered including dinner plates bearing swastikas, batteries, binoculars and a bottle of hair oil.