Planetary scientist David J. Stevenson suggested sending a probe to the core as a thought experiment. Humans have drilled over 12 kilometers (7.67 miles) in the Sakhalin-I.
David J. Stevenson, a planetary scientist, suggested conducting an experiment by sending a probe to the core. Humans have already achieved drilling up to 12 kilometers (7.67 miles) deep at the Sakhalin-I site.