1. There is a tree whose roots sink deeply into the very core of the earth .

2. Cementite occurs in steels, in meteorites, possibly at the core of the Earth and has uses in its pure form

3. One theory says that when pressurized, hot, acidic gases or fluids from the core of the earth forced their way through the granite, they reduced the hard rock crystals to fine, white china clay and other minerals.

4. And before you know it , on a tree whose roots sink deeply into the core of the earth with branches that reach all the way out into the universe , there are leaves that , even up close , do n't seem so separate .