36K views · 186 reactions | In Oak Ridge, Tennessee, 10,000 women known as the "Calutron Girls" worked on machines that helped create the first atomic bomb. They achieved higher efficiency by ensuring machine stability. By August 1945, they had produced 140 pounds of uranium-235, but didn’t learn the true nature of their work until after Hiroshima. | Lost in History | Facebook

1.7M views · 729 reactions | The last U.S.-bound slave ship arrived in Mobile, Alabama, in 1860. Now its descendants are hoping the boat’s remnants will help their community out of economic and environmental disaster | NowThis | Facebook