Hey You What If? - Series 1: 2. You Could Dig Through the Earth? - Signed

Name: Hey You What If? - Series 1: 2. You Could Dig Through the Earth? - Signed
Description: The deepest hole humankind ever dug only got one thousandth of the way through the earth. But what would happen if you kept digging?

The deepest hole humankind ever dug only got one thousandth of the way through the earth. But what would happen if you kept digging?