Cannonball bomb
Part of Hall of Planet Earth.
The Museum’s Gilder Center is an early voting site. Find your poll site at vote.nyc.
Part of Hall of Planet Earth.
When the bomb hits the ground and hurtles down the slope, making a whirring noise, its corners become sheared, and the hardened form appears as a smooth, rounded lump.
Provided by Lava Beds National Monument and Jeff Dinnel, Tionesta, California