What’s the deepest we’ve ever dug into the Earth? (Thinkstock)
What’s the deepest we’ve ever dug into the Earth?
Lexile

You asked us, "What's the deepest we've ever dug into the Earth?"
 
The deepest hole we've ever carved out is just 9 inches across.
 
Started by scientists in 1970, it took more than two decades to dig the record-holding hole, so how low did we go?
 
Drum roll, please, it was a whopping 0.2% of the distance to the center of the planet.
 
That's right, folks, the 7.5-mile-deep Kola Borehole in Russia barely managed to scratch the Earth's surface, never making it past the outermost layer of our planet.
 
Super high temperatures stopped the Russian scientists from going any farther, but along the way, they found some pretty cool things, like free water deeper than they ever thought it could possibly exist, and 2-billion-year-old fossils from single-celled marine plants 4 miles below the Earth's surface.
 
Over two decades later, an international team of scientists is hoping to go deeper, and despite a hefty $1 billion price tag and monumental engineering roadblocks, the goal is to go where no one has gone before: the mantle.
 
Some of our biggest questions about the origins and evolution of Earth could get answers, SO WHAT ARE WE WAITING FOR?!!
 
Oh, yeah, that's right, a billion dollars and better technology. Get on that science!

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CRITICAL THINKING QUESTION
Why did it take more than 20 years to dig the deepest hole?
Write your answers in the comments section below


COMMENTS (6)
  • amere-rod
    12/17/2015 - 12:07 p.m.

    .2% is really disappointing for the deepest hole and as far as im concerned they had one job a failed miserably

  • hopem1-str
    1/05/2016 - 10:51 a.m.

    It took 20 years because it is the hardest hole to dig in the earth.

  • jacobj-str
    1/07/2016 - 10:41 a.m.

    you have to do a lot of digging for the center of the earth.

  • karisb-str
    1/07/2016 - 10:52 a.m.

    Because it takes a longtime to dig that far.

  • anjelias-str
    1/08/2016 - 10:34 a.m.

    It took more than 20years to dig the deepest hole because of high temperatures.

  • bodel1-col
    2/25/2016 - 07:00 p.m.

    It took more than 20 years to dig the holes cause imagine how long it must take to make a road down to a flat spot that is already there or has to be made which takes longer and how much equipment they have to make travel back and forth. Plus imagine how hot it must get going that deep people were probably getting dehydrated and maybe a few people might have died in the process. And excavators don't have that long of arms to dig up dirt.

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