Dr. Dinsmore Alter, a respected American astronomer and meteorologist, predicted that our planet would end in "a gigantic explosion!" As earth neared the end of its time, its surface would crack open into a "vast abyss, until at last the entire globe will be rent asunder." The subsequent blast would scatter fragments of our planet into the universe, but not for millions and millions of years, Dr. Alter assured us. In between now and the end of the world, humanity would live to see the moon explode, the tides disappear, and Mars collapse into itself. Unless we relocate to another planet, we'll die out in the Earth's last ice age, or perhaps during an asteroid collision.
Dr. Alter's theories, while grim, only reflect what he believed already happened to ancient planets that died long before mankind even evolved. Our solar system can't guard itself against the ravages of time. As the planet ages, its surface will cool, causing the earth's crust to shrink and pressurize its hot inner core. As you can imagine, cracks extends thousands of miles into the planet's center can only lead to a global catastrophe.
Read the full story in "How the World Will End"