1. Two-thirds of marine species remain unknown.
2. Lost submarines of 1968
The year 1968 saw the still-unexplained loss of submarines by four countries: the United States, Russia, Israel, and France. Some say the losses could have been government cover-ups or (at least in the U.S. case) the nuclear-tipped torpedoes misfiring into the vessel.
3. Milky sea phenomenon
Milky seas are a condition on the ocean where large areas of seawater (up to 6,000 sq mi or 16,000 km2) are filled with bioluminescent bacteria or dinoflagellates, causing the ocean to uniformly glow an eerie blue at night. The condition has been present in mariner’s tales for centuries – notably appearing in chapter 23 of Jules Verne’s Twenty Thousand Leagues Under the Sea – but until recently it has not been rigorously documented.
4. Underwater whirlpools
Also called underwater tornadoes, in certain conditions they can break away and swirl around like flying saucers across the ocean.
5. There are some really huge creatures lurking down there.
Like, even bigger than this 515-pound halibut that was just caught by a German fisherman.
