The search for planets outside our solar system has found more than 6,000 such worlds, known as exoplanets. Now the race is on to find Earth-sized temperate planets, understand their atmospheres, and discover any signs of life on them. Learn how astronomers are carrying out this search and what they’ve been finding with Peter Plavchan, the NASA Landolt Space Mission’s principal investigator. Following the talk, Rob Parks, director of the George Mason Observatory, brings the skies into your living room with remote control of the observatory, weather permitting.

The Declaration of Independence is a peculiar document: a literary masterpiece that was written jointly by a committee of five people. In a full-day seminar, historian Richard Bell, a specialist in the American Revolutionary era, explores its origins, creators, purpose, and global influence. He examines how contemporaries perceived it, what transformations it triggered, and why it continues to hold significance.

Beethoven never made it to the United States, but hundreds of important musicians and composers did. From early touring megastars like Adelina Patti and Paderewski to successful later refugee émigrés such as Rachmaninoff and Kurt Weill, America has long welcomed great artists. In a four-session series filled with musical excerpts, speaker and concert pianist Rachel Franklin explores the siren call of America to musicians.

The American War of Independence freed the 13 British colonies in North America from Crown rule and set the stage for the United States’ bold experiment in self-government. Drawing on primary sources, historian Christopher Hamner traces the war from its roots in the crises of the 1770s to the first shots fired at Lexington and Concord, through the surrender of British troops under Charles Cornwallis at Yorktown, and the Treaty of Paris that followed in a springtime series. This session focuses on pre-American Revolution events from the Boston Massacre in 1770 to the battle at Bunker Hill in June 1775.

The Massachusetts 54th Regiment, one of the first African American units in the Civil War, fought under Col. Robert Gould Shaw, a white officer who shared their commitment to freedom. They famously led the July 1863 assault on Fort Wagner, where nearly half, including Shaw, were killed. Paul Glenshaw examines how Augustus Saint-Gaudens’ Shaw Memorial, unveiled in 1897 on Boston Common, honored their sacrifice with individualized portraits of the soldiers. At its dedication, the memorial reflected a growing recognition of Black soldiers’ valor and the war’s legacy of emancipation. (World Art History Certificate elective: Earn 1/2 credit)

In honor of America’s 250th, William McShea of the Smithsonian Conservation Biology Institute and SnapshotUSA are embarking on a massive project to resurvey the mammals of the Lewis and Clark Expedition Trail—and they could use your help. McShea, a conservation biologist, explains the development of wildlife observation and how ordinary people can help advance scientific knowledge of mammals and the ecosystems they inhabit, with this project and beyond.

Military historian Kevin Weddle explores how George Washington’s unique role as Commander in Chief—holding both national and field command throughout the Revolutionary War—shaped America’s path to victory. Focusing on the pivotal year of 1777, Weddle highlights Washington’s leadership through battlefield triumphs at Trenton and Princeton, political challenges after Saratoga, and the march to Valley Forge. He reveals how Washington’s experiences refined his command and prepared him for the challenges ahead.

On July 29, 1878, a total solar eclipse swept the American West, inspiring a race to the Rockies to unlock scientific mysteries. Author and science journalist David Baron shares the story of three eclipse chasers—asteroid hunter James Craig Watson, trailblazing astronomer Maria Mitchell, and young Thomas Edison—to illustrate this saga of ambition, discovery, and a nation’s quest for scientific glory during the Gilded Age.

In 1996, historian Anthony Cohen embarked on an 8-week, 1,200-mile journey tracing the Underground Railroad from Maryland to Canada. Traveling by foot, boat, and rail across five states, he visited towns, safehouses, African American communities, and Quaker sanctuaries, documenting freedom stories through artifacts, documents, and oral accounts. In 2026, marking the 30th anniversary of his walk and the nation’s 250th celebration, Cohen retraces his trek, sharing memories, images, and aspirations for a renewed journey of remembrance.

A quirky 18th-century international dispute over natural history quickly took on political overtones. Thomas Jefferson wanted to refute a French naturalist’s theory that all life in America was degenerate and weak, so he asked that a large dead moose be shipped to France. The theory, however, continued to have scientific, economic, and political implications for 100 years. Evolutionary biologist Lee Alan Dugatkin highlights this fascinating tale.