Courses from 1000+ universities
$7.2 billion in combined revenue since 2020. $8 billion in lost market value. This merger marks the end of an era in online education.
600 Free Google Certifications
Computer Science
Psychology
Microsoft Excel
Lean Production
Viruses & How to Beat Them: Cells, Immunity, Vaccines
Learn Like a Pro: Science-Based Tools to Become Better at Anything
Organize and share your learning with Class Central Lists.
View our Lists Showcase
Discover Chicago's ambitious 1940s-50s helicopter transport system that aimed to revolutionize urban air travel, connecting downtown with airports before economic challenges led to its demise.
Explores Cairo, Illinois' decline from a promising river port to a symbol of urban decay, examining its historical significance and the factors behind its downfall.
Explore the revolutionary USS Monitor's impact on naval warfare, its historic battle against CSS Virginia, and the circumstances leading to its ultimate fate.
Uncover the dark history of Bannerman Castle on Pollepel Island: from arms storage to decay and tragedy. Explore the mysteries of this forbidden Hudson River fortress.
Explore Malbork Castle's innovative medieval heating system, its history as the world's largest castle, and the daily life of Teutonic Knights in this fascinating journey through time and engineering.
Explore the exclusive Cloud Club atop NYC's iconic Chrysler Building, a symbol of Art Deco elegance and 1930s high society, now lost to time.
Explores the 1968 fire at Kansas State University's Nichols Hall, its aftermath, and the building's revival as a center of academic excellence, including the creation of the "Wabash Cannonball" melody.
Uncover the secrets of Chicago's Carbide & Carbon Building, from its Art Deco origins to its transformation into a luxury hotel. Explore its impact on popular culture and hidden stories behind its golden walls.
Explore the boom and bust of Saint Elmo, a Colorado mining town that flourished in the 1880s before becoming a haunting ghost town, preserved as a testament to frontier life.
Explore the fascinating history and ongoing controversy of La Jolla's Children's Pool, a unique beach where human recreation and wildlife conservation collide.
Explore Chicago's pioneering LaSalle Street Tunnel, its construction challenges, impact on urban development, and eventual obsolescence due to changing transportation needs and technological advancements.
Explore the rise and fall of the iconic Riviera Casino, from its glamorous beginnings in 1955 to its demolition in 2016, reflecting Las Vegas's evolution from mid-century sophistication to modern mega-resorts.
Explore the rapid rise and dramatic fall of Rhyolite, a Nevada gold rush boomtown that flourished briefly before becoming a ghost town, illustrating the volatile nature of mining settlements.
Explore the fascinating interior of America's most iconic residence, from the grand East Room to secret spaces like the Chocolate Shop, uncovering historical tales and architectural marvels.
Explore the compelling journey of Wabash Railroad's rise as a vital Midwest transportation link, its innovative contributions to American railways, and the factors that ultimately led to its decline.
Get personalized course recommendations, track subjects and courses with reminders, and more.