Digging a 10 Km hole into Earth

Have you ever wondered how thick the Earth’s crust (地殼) is? Or can you imagine howdeep we can dig into the ground? Recently Chinese scientists have begun digging a hole into the Earth’s crust, the outerlayer of the Earth, to explore the areas deep inside our planet. The borehole (鑽井),expected to be 10km (10,000 metres) deep, will be the ...Read More