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6pm – 9pm, Merrimac Room (middle hallway), Huntsville-Madison County Senior Center, 2200 Drake Ave. SW. Park in North lot.
Did You Know? In January, researchers at NASA’s Johnson Space Center identified the world’s oldest asteroid crater: a 43-mile wide impact structure in Yarrabubba, Western Australia. By analyzing radioactive elements in sample rocks, geochronologists determined that the collision occurred about 2 billion years ago. The impact sent 100+ billion tons of water vapor into the upper atmosphere possibly triggering a period of global warming. Source: The Week, February 14, 2020
May - Emerald: The most valued variety of beryl, emerald was once cherished by Spanish conquistadors, Inca kings, Moguls, and pharaohs. Today, fine emeralds come from Africa, South America, and Central Asia.
Sources: https://www.gia.edu.
