Sources used for this story include: “Rai… Heaven: Where Rocks Go Wandering,” by Tim Cahill (National Geographic). The world still holds many wonders that science—so far— cannot explain. As you learn about the three mysteries described, see if you can hypothesize any scientific...

As a child, Joseph Priestley noticed something that would influence the rest of his life: If you keep a bug in a jar for too long, it will die. At the time Joseph Priestley didn’t understand why that was true—nobody did. No one really studied the air; it was something everyone took for granted.

In 1927 a Roman Catholic priest and scientist Georges Lemaitre proposed what later became known as the Big Bang theory of the origin of the Universe, based on work by Edwin Hubble who theorized and then proved that the Universe was getting bigger and bigger. Many scientists have discovered other...

Sources used: Encognitive.com on YouTube. "Linus Pauling: Nature of the Universe." Marshall Klarfeld. "Linus Pauling speaks." on YouTube. Charles Hartshorne. Man's Vision of God and the Logic of Theism. Hamden, CT: Archon Books, 1964. Unitarian Universalist Historical Society....

About two hundred years ago, lots of people in North America and in Europe were discovering all kinds of wondrous things in the ground. They found coal to burn for fuel, iron for making machinery, nickel for creating tools and candlesticks and other useful items....

Clyde had finished his farm chores. Now he was free to spend the rest of the evening doing his favorite thing: stargazing. He got out his telescope and he looked up into the night sky. While he looked at the moon and the stars he wondered about the universe....