All Day

Urban Tree Summit

Silver Spring Civic Center One Veterans Place, Silver Spring

(DC) (MD) (VA) (Casey Trees) Casey Trees and Montgomery Parks present the 13th annual Urban Tree Summit (UTS). Conference presentations will focus on the health and welfare of trees in our increasingly developed landscapes. We encourage all arborists, landscape industry and environmental/green industry professionals, engineers, designers, housing developers, and interested citizens to take advantage of this opportunity to learn from experts, ...

$49 – $150

Exhibit: Recovering Our Night Sky

Smithsonian National Museum of Natural History 1000 Madison Drive NW, Washington

(DC) (Smithsonian Natural History Museum) What do brighter nights mean for people and wildlife? Through over 100 photographs, nearly 250 objects, interactive experiences, tactile models, and a theater program, discover why dark nights matter, rekindle your connection with the night sky, and consider how much light at night is enough—for whom, for what purpose, and who gets to decide? Open ...

Free
Capital Nature