<p>If you drilled a hole through the entire Earth from one pole to another would you not risk letting all the air out?</p>
<p>We'd go hurtling through space like an untied balloon</p>
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<p>****PFFFTFTTTTT******</p>

<p>A very stupid question. I can't see it happening either so no time frames.</p>

<p>Your question has two answers - A theoretical answer and a practical answer.&nbsp;</p>
<p><strong>Theoretical answer:</strong></p>
<p>Yes, a hole can be drilled to any object, even if it's a planet. Secondly, if we assume that we have a machine that can dig through earth without ever stopping and at a constant speed of 50 feet per day (an average for a tunneling machine), then it would take a 836089 days or around 2300 years.</p>
<p><strong>Practical answer:</strong></p>
<p>No, you cannot dig a hole through earth. Here are the simplest of reasons:</p>
<p>1. The temperature at the center of Earth exceed 5000 degrees. We simply do not have the machinery that can operate at that temperature.&nbsp;</p>
<p>2. Even if we are able, than we face the issue of extreme pressure at great depths(hundreds of millions of time the normal atmospheric pressure) . We do not yet have a building material that can actually support a tunnel skeleton at that pressure. Even if we have it, then it would melt at that temperature.</p>
<p><strong>NOTE: </strong>That the deepest man made hole on Earth is Kola superdeep borehole in Russia and its around 12.2 kilometers deep. They had to shut down after that. &nbsp;</p>
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