Images: Photographic marvels in a petri dish

This 10x stereomicroscopy photo shows a flower from Zygocactus truncatus, more commonly known as a holiday cactus or Christmas cactus. It was submitted by Viktor Sykora, of the Czech Republic.

You can find the complete gallery of award-winning photos from the competition here. Got one of your own? The deadline for entries for next year's competition is April 30, 2009.

Photo by Viktor Sykora/Nikon

Caption by Jennifer Guevin