who played bones in the original star trek???

Answer: Jackson DeForest Kelley

Question: when did the earth's population reached 1 billion?

Answer: 1804

Answer this question: what is the meaning of gui in computer??

graphical user interface

Q: how to tell if the groundhog sees his shadow?A: due to clear weather

Input: who sang the theme song to high noon?

Output: Tex Ritter

Please answer this: where does the heat energy for geothermal energy resources come from?
from radioactive decay of materials