Albert Bierstadt's 1869 painting depicts which emigrant route that led to Oregon's Willamette Valley?

After which waterway opened in 1825 were freight rates between Buffalo and New York City cut by more than 90%? In the Bible, after the death of which wife did Abraham marry Keturah? After Thomas Jefferson's death, his daughter Martha sold which of his homes to a local druggist? After some 17 years in the service of Kublai Khan, Marco Polo returned home in 1295 to which city? After the TV sitcom "Townies", which former Brat Pack actress starred off-Broadway in "How I Learned to Drive" in 1998? After visiting them in 1829, Felix Mendelssohn wrote an overture named for which Scottish islands? After wandering all over the Southeast, which Spanish conquistador died near the Mississippi River in 1542? After wearing glasses through his PGA career, Tom Kite had which kind of laser eye surgery in 1998?