- What is there more of, stars in the observable universe or grains of sand on earth?
- why is it that the inner core is the hottest part on earth yet the deepest part? its the part furthest away from the
- If the earth really revolves around the sun, then why when we look at the sun we can see it plainly revolving around
- is it true that the earth constantely have earthquakes ever few minutes but not very strong ones? and we are so use to