82% of the planet's ocean bed is unmapped.
So we **think** we know where the deepest points are.
So we **think** we know where the deepest points are.
Noone had gone into the Marianna trench since the late 50s until James Cameron (yep that one) in 2012.
10,908m down.
10,908m down.
The design of the vessel used to explore the trenches. Made from titanium. Incredible thinking involved to do the job. 
Surveys done in the 1920s (by German scientists) were show to be with a metre using modern techniques!
The Five Deeps group were aiming to dive the deepest point of each of the five oceans. They had to find them first. Some serious team work needed between different disciplines in the middle of uncharted water.
Charting the whole Java Trench
Landslides on the trenches (formed from plate tectonics) are implied in tsunamis so studying them is critical.
Here is the deepest recorded octopus ever. Smashing the previous record. 🐙 🏅
The Artic Ocean was the real challenge - dealing with ocean ice.
With a sub that is white!
With a sub that is white!
And yes @moriati23 they found human made waste. Cables. Beer bottles and cans.
The plastic bag was a different trench but that is arguing the toss. More waste near the coast of countries we export our rubbish to.
The plastic bag was a different trench but that is arguing the toss. More waste near the coast of countries we export our rubbish to.
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