Jackie Robinson's widow, Rachel, who's a Mets and Dodgers fan, helped honor her late husband before a Mets baseball game against the Chicago Cubs in April. Mets manager Jerry Manuel is at right. Kathy Willens/AP hide caption

itoggle caption Kathy Willens/AP

The L.R. Doty at the Soo Locks in 1896. Two years later, the steamship sank, killing all 17 people onboard. Andrew Young/Courtesy of the Historical Collections of the Great Lakes hide caption

itoggle caption Andrew Young/Courtesy of the Historical Collections of the Great Lakes

Quanah Parker was the last chief of the Comanches — and the son of Cynthia Ann Parker, who was captured as a child by the Comanches. Hulton Archive/Getty Images hide caption

itoggle caption Hulton Archive/Getty Images

The Separation of Light From Darkness was one of the last Sistine Chapel frescoes painted by Michelangelo. Researchers at Johns Hopkins University say they've found in the lines of the character's neck an anatomically correct drawing of a brainstem. Copyright 2010, Congress of Neurological Surgeons hide caption

itoggle caption Copyright 2010, Congress of Neurological Surgeons

William-Henry Ireland forged hundreds of documents and passed them off as William Shakespeare originals. After his confession, he went on to publish a series of Gothic novels and some romantic poetry. Courtesy of Doug Stewart hide caption

itoggle caption Courtesy of Doug Stewart

The Hoover Dam, says Hiltzik, has a "machine beauty" but still manages to convey a "tremendous elegance." Simon & Schuster hide caption

itoggle caption Simon & Schuster

Silent film comedian Mabel Normand directed and starred in the 1914 film Won in a Closet. It is the first surviving film she is known to have directed. Courtesy of the National Film Preservation Foundation hide caption

itoggle caption Courtesy of the National Film Preservation Foundation

A skull unearthed at a site in York, England, which may be part of the world's best-preserved Roman gladiator cemetery. Press Association via AP Images hide caption

itoggle caption Press Association via AP Images