David R. Montgomery, PhD, University of Washington, Earth and Space Sciences, and Ann Bikle, MLA, Biologist and Environmental Planner will speak at the Hunnewell Building of the Arnold Arboretum on Sunday, January 8, from 2:00–3:30pm with a lecture entitled The Hidden Half of Nature: The Microbial Roots of Life and Health.

From garden to gut, David R. Montgomery and Anne Biklé will present a new view of the tiniest creatures on Earth and how it is changing the way we see nature and ourselves. Through the twists and turns of history, science, and personal experience, they’ll reveal our tangled relationship with the microbial world, including the stunning similarities between what’s going on around the roots of plants and deep within the human gut. Fee: Free for Arboretum members and students, $10 nonmember. Register at my.arboretum.harvard.edu or call 617-384-5277.