This close-up photo of chalk looks like tiny alien spacecraft

This incredible photo shows what chalk looks like close-up under a microscope. I thought chalk would just look like a bunch of white powder when examined close up. Instead, when looking at natural chalk under a microscope, you see these amazing spherical shapes with wild patterns, and they look kind of like alien spacecraft. — Read the rest The post This close-up photo of chalk looks like tiny alien spacecraft appeared first on Boing Boing.