Black abolitionist Prince Hall could be considered a founding father.

Washington's indispensable Marblehead Regiment, and the surprising Henry Knox.

Mollusks cultivate underwater gardens, cuttlefish become invisible, and tiny fish run spas for predators. Meanwhile, some ingenious humans work to protect the underwater world that most of us rarely see.

Photograph from UNDERWATER WILD by Craig Foster and Ross Frylinck. Copyright © 2018, 2021 by Quivertree Publications. Reprinted by permission of Mariner Books, an imprint of HarperCollins Publishers LLC. All rights reserved.

Some of the strangest, quirkiest, worst days in history, to help you put your own bad days in perspective.

How a black American nurse and a German POW fell in love during WWII. The hardship and triumph of a high school football team from an internment camp during WWII.

When a comet crashes into Jupiter, the first to see it are amateurs at the Vatican Observatory in Rome, who can't restrain themselves from shouting and dancing. Far to the north, an aurora hunter backs into a freezing river in Iceland and barely notices his frigid feet. His eyes are on the skies. Miracles, mindfulness, and celestial wonder.

Guest: Brother Guy J. Consolmagno, S.J., Director of the Vatican Observatory, "The Pope's Astronomer," and author of "Turn Left at Orion: Hundreds of Night Sky Objects to See in a Home Telescope—and How to Find Them"

Guest: Tom Kerss, F.R.A.S., aurora-hunter, veteran of the Royal Observatory, founder of Stargazing London, and author of "The Northern Lights: The Definitive Guide to Auroras"

The other Lafayette, enslaved hero of the Revolution. And, a woman successfully sues her former enslaver.

A complicated legacy: he pulled England out of poverty, but he was a brutal pirate.

A cancer survivor dispels the myths and stigmas of cancer survivorship. Nancy Frates, co-creator of the ALS ice bucket challenge, explains how the movement took off.

A cancer survivor dispels the myths and stigmas of cancer survivorship. Nancy Frates, co-creator of the ALS ice bucket challenge, explains how the movement took off.