I had the privilege of visiting the Smithsonian National Museum of Natural History a few months ago and got to touch a piece of Mars!
The Naklha meteorite fell to the Earth near Alexandria, Egypt, in 1911, and is most famous for killing a dog (no human has been killed by a meteorite in recorded history). Click here for reasons why scientists believe this meteorite came from Mars rather than elsewhere, such as the asteroid belt.
I also got to touch a rock from the oldest piece of crust on the Earth. The museum has a sample of the Acasta Gneiss from the Canadian Shield, which is close to 4 billion years old.
Touching these was actually a rather moving experience for me.
Grace and Peace