Supermoon? Blue moon? Blood moon? Yeah, let’s go ahead and pump the brakes on those names, because the first was created by an astrologer, the second is highly subjective, and the third only became popular recently (thanks, this-must-be-prophecy types). Let’s clarify what these terms really mean.
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(Credit: Lizard/Shutterstock) Crack open an oyster shell and the inner face shimmers in a rainbow of kaleidoscopic colors. This smooth material, known as mother-of-pearl, is...