Expedition leader Paul Rose, environmentalist Philippe Cousteau Jr, maritime archaeologist Dr
Lucy Blue and marine biologist and oceanographer Tooni Mahto make a dangerous dive into a
'black hole' to discover how different our planet's earliest oceans were 3.5 billion years
ago. They dive one of only two places on the planet where the oldest lifeform on earth still
survives: Stromatolites, the creatures responsible for transforming our ancient oceans by
producing oxygen.
They brave waters teeming with sharks to act as human bait in an experiment to test a shark
repellent. They also investigate how the Atlantic has been invaded by the poisonous lionfish
which is decimating local fish stocks and spreading fast. And they try to identify a lost
British Warship, the HMS Southampton, which was shipwrecked after winning a battle against an
American vessel in the war of 1812.
