The phylogenetic relationship of ctenophores (comb jellies) to other animals has been a source of long-standing debate.
Until recently, it was thought that Porifera (sponges) was the earliest diverging animal lineage, but recent reports have instead suggested Ctenophora as the earliest diverging animal lineage.
For the past 30 years, researchers have used whole-genome sequencing of organisms to advance their understanding of evolution.
"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.
Trekking Canada’s Sub-Arctic Region in Manitoba
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.
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.
