1. What, if anything, is under the earth?
2. How do you explain the fact that the universe is billions of times larger than the earth and extends in every direction, yet the earth is measurably small? Is there an edge of the universe that is exactly as wide as the earth (small as it is) and it just extends upwards from there? How is it that such enormous things (e.g. stars much larger than the sun) can fit inside?