The next Science on Tap is 7 p.m. Feb. 12 at the Kiggins Theatre. “Thigmomorphogenesis: Why Trees Don’t Fall Over” is $15 to $45 at kigginstheatre.com/movie/science-on-tap-thigmomorphogenesis. Arborist, a dendrologist and educator, Casey Clapp is the principal consultant with Portland Arboriculture and co-host/co-creator of “Completely Arbortrary,” a weekly podcast about trees and related topics. In the Pacific Northwest, trees grow to be some of the tallest and largest organisms on the planet. Tthis talk will explain what the trees are doing, how they react to their environment and what you can do to make sure your trees are safe. For more details about this or other Science on Tap events, visit Science on Tap OR WA.