What Is It? #18

Can you guess what this rather bizarre landscape really is?

A. Not a real image at all - it's what you see on the SEM screen when lightning strikes the power lines

B. Marks on a bone left by a prehistoric stone tool

C. Asbestos fibers embedded in paint

D. Fracture surface of a fiber optic cable

E. Fracture surface of the mineral ulexite (the "TV Stone"), which has natural fiber optic properties