- What is a multiverse?
- What other kinds of worlds might there be?
- How does string theory research tie in with Einstein's search for a unified theory?
- What is the biggest misconception people have about physics?
- Are these theories applicable in the real world?
In a related article, Hank Campbell speculates on the possible existence of a super-planet which may be binary to our sun, orbiting far beyond the eight planets with which we are familiar in a region known as the Oort Cloud (see image below), which resides some 50,000 AU from the sun and is the hypothetical source of our solar system's comets . Campbell's article includes graphics and a down-to-earth explanation of the research.
MAP GAMES. Here are two links to games which will test your knowledge of geography. You can click-and-drag to place U.S. states in their proper position, or you can click-and-drag to correctly match the names of countries in the Middle East with their actual locations. Each may take some practice. I've managed to score 100 percent several times on the U.S. states game, but am embarrassingly still guessing at some Middle East match-ups. Have fun !!