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Green Mountain Academy for Lifelong Learning (GMALL) welcomes Union College Professor Mark Walker to discuss big history. Big history is an exploration of the past from the big bang to the present, dividing the history of the universe, earth, life, and humanity into periods using very large scales of time. This presentation will take us on a quick journey spanning billions of years, helping us to understand our current position in time and space. Registration is $18 in advance or $22 at the door. For more information or to register, please call our office at 802-867-0111 or visit www.greenmtnacademy.org.