The author of "What If the Moon Didn't Exist?" leads readers on a fascinating 10-world journey that explores what Earth would be like under alternative astronomical conditions. In each case, the Earth would be different, often in surprising ways. Line drawings throughout.
"What if?" questions have always stimulated people to think in new ways. What if the Earth Had Two Moons leads us on a fascinating 10 world journey exploring what the Earth would be like if conditions in the universe were slightly different. The answer: Earth would...