Originally published at: http://www.howtogeek.com/193314/why-is-it-hot-underground/
Have you ever been curious why it gets hotter the deeper underground your go? Perhaps you have children who have asked you the same question? Then wonder no more! Emily Elert from YouTube channel MinuteEarth explains why Earth is hot underground in today’ video.
"We now know" (how old it is)... sorry, we don't... just because a majority agrees to a theory doesn't make it fact... "we now know" implies fact, which is not the case in the age of the earth since know one really knows
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