The Conversation on MSN10d
Why are rubies red and emeralds green? Their colors come from the same metal in their atomic structure
But how can one element—chromium—create the red color of a ruby and green color of an emerald? Rubies and emeralds have the ...
UPI23d
Mysterious green light over Ontario 'most likely' a meteor
22 (UPI) --A mysterious green light caught on camera in the night ... but most likely a small piece of the leftover material that created the solar system." Feb. 14 (UPI) -- A Brazilian couple ...