They were shot by a variety of amateur photographers, professionals and scientists.
Zebrafish olfactory bulbs (250X)
4th Place: Riccardo Taiariol, La Spezia, SP, Italy.
Juvenile bivalve mollusc, Lima sp.
Colorado, Boulder, Boulder, Colorado, USA.
Crystallised melt of sulphur and acetanilide (10X), Transmitted Light, Crossed Polars