Description: Snow and its flakes: appreciated by some and despised by others, dreaded and welcomed at the same time, here today and gone tomorrow; such would not be the case for one particular snowflake, thanks Wilson Bentley.
Description: Retired geologist Dr. Ursula B. Marvin, Smithsonian Astrophysical Observatory, studied lunar samples from the Apollo missions, and meteorites around the world. She has both an asteroid and a mountain ridge in the Antarctic ice named after her. #Groundbreaker