https://en.m.wikipedia.org/wiki/Kola_Superdeep_Borehole
don't panic. There are deeper ones
Yes. Russia made it in the end of the 80`
https://en.m.wikipedia.org/wiki/Kola_Superdeep_Borehole#:~:text=In%20terms%20of%20depth%20below,deepest%20artificial%20point%20on%20Earth.
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