Photo: Gerd Guenther/Duesseldorf, NRW, Germany
They look like they came straight out of a science fiction movie, but those are real. Gerd Guenther took that micrograph of spherical colonies of bluegreen algae Nostoc commune, and won 10th place at the 2011's Olympus BioScapes competition.
Take a look at more winning entries over at the Olympus BioScapes' website: Link - via The Big Picture