Polar Ice Conditions: NASA scientist Thorsten Markus discusses change in the polar ice cover. [11:30 a.m. Library of Congress, 101 Independence Ave. SE]
Sonya Suhnhee Kim: Piano soloist performs works by Haydn. [12:10 p.m. Church of the Epiphany, 1317 G St. NW]
Friday Morning Music Club: A chamber concert performance of Beethoven and more. [Noon. Dumbarton House, 2715 Q St. NW]
Warren Berger: Author and journalist discusses proactive design and global problem solving. [7 p.m. Corcoran Gallery of Art, 500 17th St. NW]
Iconoclash: An exhibit of political and cultural artifacts from the fall of the Berlin Wall. [10 a.m. Goethe-Institut, 812 Seventh St. NW]
Children at Play: An exhibit of traditional scenes from Chinese painting. [10 a.m. Freer Gallery of Art, 1200 Jefferson Drive SW]
“Bluff”: A French Canadian mystery film is screened. [7 p.m. Letelier Theater, 3251 Prospect St. NW]
Carbon Economy: A summit on making global warming solutions profitable. [4 p.m. Ronald Reagan Building, 1300 Pennsylvania Ave. NW]
Zuckerman Chamber Players: A Brahms performance featuring Canadian pianist Angela Cheng. [7:30 p.m. Kennedy Center, 2700 F St. NW]
Form and Content: An exhibit by historian and mixed-media artist Floyd Coleman. [10 a.m. Historical Society of Washington, 801 K St. NW]
Underground scene Langhorne Slim: Folk singer-songwriter performs with Dawes. [8 p.m. Rock and Roll Hotel, 1353 H St. NE]
El Ten Eleven: The post-rock duo performs with the Orchid. [8:30 p.m. Iota Club, 2832 Wilson Blvd., Arlington]
