Titanic Sinking – Optical illusion?

Titanic possibly sank due to an optical Illusion: Smithsonian As a kid I remember learning these principles with no real world tangible examples. Today as I see a plausible explanation, I’m baffled!

Freediving

The very concept of diving to depths without any apparatus, Japanese Ama tribe, Spear-Fishing  – Learning about these for the first time today!  Mind boggling! Deep: Freediving and What the Ocean Tells Us about Ourselves