While walking today across campus, I thought randomly about supposed "bottomless pits" on earth (not the bottomless pit that Satan will be hurled into one day). If you don't know what I'm talking about...I was imagining the bottomless pit in the movie Tom and Huck, starring Jonathan Taylor Thomas and Brad Renfro. I have a few comments on this...
First, raging hot lava is found the closer towards the center of the earth that you go. So, for all other comments to be made, we have to assume that no lava is found at the center of the earth.
Second, without lava, a bottomless pit would reach all the way to the other side of the earth eventually. And, if there is just one giant hole in the earth from one side to the other, how does gravity work, if someone were to fall inside this pit? Would he or she hang suspended in the middle, gravity on one side of the earth forcing them one way, and gravity from the other side forcing them the other way? (So, putting lava back in the picture, would it hang suspended as well?)
Hmm...what do you think of these random thoughts?