A six-minute immersive panoramic-video experience brings to life the moment that the asteroid — traveling about 45,000 miles per hour — struck Earth.

Ask anyone who’s lived on the UWS long enough, and they’ll tell you: this neighborhood used to move after dark.

Among the seminal documents of the American Revolution on display are Thomas Paine's Common Sense and versions of the Declaration of Independence.

This photo was taken on the UWS, sometime in the past. Do you know where, when, and what it shows?

Two UWS churches received funding to help with roof, window, and wall renovation work.

This photo was taken on the UWS, sometime in the past. Do you know where, when, and what it shows?

Sometimes it takes losing a few pilings of the past to remind us why it matters.

These photos were taken on the UWS, sometime in the past. Do you know where, when, and what they show?

This photo was taken on the UWS, sometime in the past. Do you know where, when, and what it shows?

It doesn’t look like full-sized Upper West Siders could possibly live in there. But they do.

Ever want to spend a night at the American Museum of Natural History?

We take 9/11 personally around here, near the Fireman's Memorial on upper Riverside Drive, at the foot of West 100th Street.

These photos were taken on the UWS, sometime in the past. Do you know where, when, and what they show?

"Books age like us. They get brown spots, and they get brittle, and eventually they turn to dust."

This photo was taken somewhere on the Upper West Side, sometime in the past. Can you figure out where, when, and what it shows?

A program being tested by Con Ed this summer provides batteries to power AC at times of peak demand.

Here are more -- and I mean more! --  of my favorite photos.

This photo was taken on the UWS, sometime in the past. Do you know where, when, and what it shows?

We all have broken molds and made moves that mattered, in our own lives or even in the lives of others.

Now we move to places on the UWS in the 1970s and 80s, including some that have stood the test of time.

When much of the city – including the Upper West Side – was undeveloped, squatters began camping out on city lands they didn’t own.

Soon the days will be gone when you help your tourist friend master the it's-all-in-the-wrist swipe.

This photo was taken somewhere on the Upper West Side, sometime in the past. Can you figure out where, when, and what it shows?

I've come to the end of my images from those vanished days of the 1970s and 80s. These are my last.

I loved taking candid photos and portraits of people I saw on the Upper West Side in those vanished days.

This photo was taken somewhere on the Upper West Side, sometime in the past. Can you figure out where, when, and what it shows?

A new book documents the history of public monuments to Black Americans in New York City, including a number of sculptures on or near the UWS.

This photo was taken somewhere on the Upper West Side, sometime in the past. Can you figure out where, when, and what it shows?

It's a bird, it's a plane, no, it's the 9 train!

"Yay you, Church!"