There are people who propose that the tidal effect of the Moon may have helped trigger the convection on the Earth that led to the multi-plate tectonics. .... read more
The book by Neil Comins, “What if the Earth Had Two Moons” is a serious work by an accomplished physics and astronomy professor, and author of one of the country’s leading astronomy textbooks (Discovering the Universe). read more
It would mean a more complicated modulation of the tides. On earth, we have a superposition of two cycles: An exactly 12 hour cycle of the sun, and a cycle deviating from that by the moon. The moon tides are dominant because the sun, although much more massive, is much farther away. Yet the effects are already within the same order of magnitude. read more