In the last four years of the 19th century, over 100,000 prospectors flooded into the Klondike region of Alaska and Canada looking for gold. Klondike Gold Rush National Historical Park not only tells the stories of these pioneers, it preserves 13,000 acres of historic sites and stunning wilderness. Traveling the trails is like going back in time. Photo by C. Anderson, National Park Service.

Be prepared for sunrise splendor at Cumberland Gap National Historical Park. It’s a thrill watching the sun paint the sky from the park’s Pinnacle Overlook. Here you have views of Kentucky, Virginia and Tennessee. On clear days, you can even see the Great Smoky Mountains in North Carolina – a sight that’s 100 miles away! Photo by Volunteer Harold Jerrell, National Park Service.

For decades, there have been few photographic images of Harriet Tubman depicting how the abolitionist and Civil War spy looked in her lifetime.

Now there’s one more.

New York City auction house Swann Galleries has announced that it will auction a newly discovered photo of Tubman March 30.

Kate Clifford Larson, author of the biography “Bound for the Promised Land: Harriet Tubman, Portrait of an American Hero,” estimated that Tubman was between 43 and 46 years old when the photo was taken, placing it shortly after the end of the Civil War. At the time, Tubman was living in Auburn, where she had purchased land in 1859 from then-Sen. William H. Seward — land that will soon become the Harriet Tubman National Historical Park.

Larson said that in her 20 years of researching Tubman, she’s been sent dozens of photos of black women by people claiming to have discovered a new image of the soon-to-be face of the $20. But not one has actually depicted Tubman.

The ruins in New Mexico’s Chaco Canyon are some of the most well-preserved remnants of the Ancestral Pueblan civilization in the Four Corners area of the southwest. But tucked in a small canyon, painted on a rock overhang are these strange pictographs. One is a clear depiction of a human hand, but the other two are thought to show the crescent moon alongside a star that went nova on July 4th, 1054. 

This event would have been noticeable and spectacular–the brightness of a supernova is such that it can be seen in the daytime and even outshine the moon itself, making the night sky appear eerily bright. It was seen all around the world, and matches similar depictions seen in every inhabited place on Earth at the time. And on that night, the moon was indeed in the waning crescent phase.

Today, although the bright supernova is no longer lighting up the sky, we now know it as the Crab Nebula.