The search for remains of formerly enslaved Black Union soldiers brutally murdered by angry Southerners as the Civil War was ending. Learn about Camp Nelson, KY, the military base where these soldiers and thousands got their freedom papers.

The search for remains of formerly enslaved Black Union soldiers brutally murdered by angry Southerners as the Civil War was ending. Learn about Camp Nelson, KY, the military base where these soldiers and thousands got their freedom papers.

The search for remains of formerly enslaved Black Union soldiers brutally murdered by angry Southerners as the Civil War was ending. Learn about Camp Nelson, KY, the military base where these soldiers and thousands got their freedom papers.

Leonardo da Vinci is well known for his inventions as well as his art. But new evidence shows that many of his ideas were realized long before he sketched them out in his notebooks - some even 1,700 years before. Was Leonardo a copycat?