Earth

What Is Black Tourmaline?

Black tourmaline is a particular variant of tourmaline, a crystalline borosilicate mineral. It is thought that the particular hue of black tourmaline is due to…
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Why Are Flamingos Pink?

Flamingos are pink because of the food they eat. The high concentration of beta-carotene in the shrimp, algae, and larva that flamingos eat imparts a pink…
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