Chemist Sir Humphry Davy is known for his work with nitrous oxide, or laughing gas. That early part of his career is the focus of part one of this two-parter.

This 2014 episode covers the Sultana, which sank the day after John Wilkes Booth was captured and killed for the murder of Abraham Lincoln So the maritime tragedy didn't make headline news.  See omnystudio.com/listener for privacy information.