March 8, 1959 marked a key date in the careers of the irrepressible Groucho, Chico and Harpo Marx, for that was the day they appeared together for the last time on screen, on TV’s “General Electric Theater” on CBS. Jane Pauley looks back at the careers of the comedy icons. Source

Whoever said “You snooze, you lose,” never met Brian Halligan, CEO of a Boston-area tech company, who admits he sleeps on the job. And researchers say that can be a good thing: An afternoon nap has been found to improve performance, cognition and memory, and reduce frustration. Need proof? How about the 2013 Boston Red Sox, who put a nap room in the clubhouse, on their way to earning their World Series championship rings? Susan Spencer talks with Dr. Charles Czeisler, researcher Dayna Johnson, and “sleep historian” Roger Ekirch about the restorative effects of naps, how our sleep architecture has changed over time, and why sleep-deprived Americans spend almost $30 billion a year on items (from weighted napping blankets to odd-looking headgear) aimed at helping them catch some Zzzzzz. Source

The book “Picture: Muhammad Ali” shows how photographers from the Louisville Courier-Journal, the boxer’s hometown newspaper, captured both public and private moments of “The Greatest” Source

Researchers say sleeping on the job can be a good thing; a mid-afternoon nap has been found to improve performance, cognition and memory Source

Dr. Jon LaPook with the latest on the virus’ spread in the U.S., and what precautions you should take to avoid infecting yourself and others Source

Harris said in a statement that Biden “reflects the decency and dignity of the American people and who can ultimately defeat Donald Trump.” Source

The book “Picture: Muhammad Ali,” featuring rare photographs of the boxing legend taken by staff photographers of the Louisville Courier-Journal, covers the entire length of “The Greatest”‘s career Source

On this “Face the Nation” broadcast, we sat down with Surgeon General Jerome Adams, Senator Chris Murphy and Washington Governor Jay Inslee Source

A rare look inside a murder case where virtually everything from the first moments of the investigation through the verdict are captured on camera. “48 Hours” correspondent Richard Schlesinger reports. Source

“It’s a big issue that goes way beyond science education,” one educator says. Source