What lives under the crust of the Earth? ( Archived) (80)

This subject has had me tickled for a long time:

How much exploration has been done under the earth crust (under the ground under your feet). How far down have they gone and what was found, and how far are they still planning to go, looking for what?

nothing but a hot core, and flowing lava

No, but what about the things that live in that ?

nothing lives there

not were the lava is, at least

now, if you dig 5 inches, only earth worm

and stuff like that

There must be things that can live under those temperatures, and my Mulberry tree's roots go how far down according to you?

as I heard, some roots

could go down over 20 feet

Google:
A new study, published recently in Nature Communications, has discovered 17 species of animals living in water trapped in rock as deep as 1.4 kilometres underground in two South African gold mines. They include: A wide variety of worms — flatworms, roundworms, and ringed worms related to earthworms.Dec 4, 2015

A wide variety of worms — flatworms, roundworms, and ringed worms related to earthworms.
Aquatic organisms called rotifers.
A copepod, a tiny relative of shrimp.

How far can humans go underground?
Further to Dave Haynes' reply, the deepest penetrations have been by boreholes, not mines. There is a 9.1km borehole in Germany, part of the Continental Deep Drilling Project (KTB), but deeper still is the 12.25km "Superdeep" hole in the Kola Peninsula near the Arctic Circle in Russia, drilled between 1977 and 1989.

last night watching Nova

in Cancun Mexico

under water in caves, bones animals were found

and, human skeleton amongst those bones

aged 13K years they had to dive 200 feet

and take brakes to go up again

. yep and I forgot to include forum trolls.