What Makes the Deep Ocean Mysterious?

The deep ocean covers more than half of Earth's surface, yet most of it remains completely unknown.

Scientists have explored less than twenty percent of the ocean floor.

The deeper you go, the darker and colder it becomes.

At great [depths], there is no sunlight at all.

The pressure in the deep ocean is extremely powerful and can crush metal submarines.

Many creatures living there have developed strange and fascinating features to survive.

Some deep-sea fish produce their own light through a process called bioluminescence.

The anglerfish, for example, uses a glowing lure to attract prey in total darkness.

Hydrothermal vents on the ocean floor release hot water full of minerals.

Surprisingly, unique communities of animals live around these vents without needing sunlight.

Scientists discover new species in the deep ocean every year.

Exploring this environment is extremely difficult and expensive.

Special underwater vehicles must withstand enormous pressure to reach the deepest points.

The deep ocean still holds many secrets waiting to be discovered.