Cavemen had a really tough time.
So caves are really beautiful and magical places full of fairies right?
This is the largest cave chamber in the world, isn't it pretty and roomy?
No you're wrong.
Robbie Shone / shonephotography.com / CC
Well what if all the light bulbs went huh? Not so pretty then.
And even the most up to date head torches only extend to about 150 feet so when you first wander into a large cave chamber there is going to be lots of little corners you can't quite see.
Caves go down a really long way.
This a map of the Krubera Cave in Georgia, which at the moment is the deepest known cave on earth. It is the first cave to have been explored to a depth of below 2000m.
The cavers who explore these caves spend weeks underground, setting up base camps, a lot like mountaineers, except upside down in the dark. Fun huh?
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