The Earth we can see is just the surface of our planet. What is under the surface?
Look at these pictures.
Explorers can help us learn about life underground!
The Earth's surface hides many amazing things.
There are caves underwater.
These underwater caves are hard to explore.
Cave divers have to wear scuba gear when they are diving to help them breathe.
They need lights to help them see.
It can be very dark in underwater caves.
Sometimes, cave divers dive for a long time.
Some dives take hours!
Imagine being underwater in the dark for hours!
Cave diving can be dangerous.
There are many sharp rocks and tight spaces.
If a diver's scuba gear breaks, the diver is in trouble.
Sheck Exley was a very famous cave diver.
He taught explorers many new things about how to dive safely.
Exley explored many caves in the world.
Sheck Exley died during one of his dives.
Being a explorer can be very dangerous!
Today, many explorers are brave enough to explore underwater and underground caves.
Would you be brave enough?
Exercise
Please open the exercise to continue.