How deep have humans dug into the Earth?

What animals dig the deepest burrows? How deep do they burrow?

What is the deepest humans have dug by hand?

What is the deepest depth that humans have reached into the Earth? Measure in feet.

According to the video, what challenges did scientists face when digging deeper into the Earth's crust?

Have humans even reached half way through the crust

• Yes! They went all the way through it.

• No! They couldn't reach that far, it's too hot to go any further.