B-58A Escape Capsule

The "Wings Over the Rockies" aviation museum in Denver has an exhibit featuring these. The one on display is small and looks like ancient tech. I highly recommend visiting Wings Over the Rockies if you can.

The sign on the exhibit features the claim that the extensive capsule testing ultimately featured an ejection with a LIVE BEAR. A little research says that's true, but they ended up euthanizing the bear to look for internal injuries.