What if the Earth had Two Moons?

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Source:  Amy Shira Teitel, Universe Today
Excerpt:  …Since 2006, astronomers have been tracking smaller secondary moons that our own Earth-Moon system captures; these metre-wide moons stay for a few months then leave. But what if the Earth actually had a second permanent moon today? How different would life be?   ... For his two-mooned Earth thought experiment, Comins proposes that our Earth-Moon system formed as it did — he needs the same early conditions that allowed life to form — before capturing a third body. This moon, which I will call Luna, sits halfway between the Earth and the Moon.  …Eventually, the Moon and Luna would collide; like the Moon is now, both moons would be receding from Earth....

 www.universetoday.com/92148/what-if-the-earth-had-two-moons/

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