However it was this picture of a arabidopsis thaliana (thale cress) anther that won the coveted title. Paves from Tallinn University used a 20X zoom to caputre the illumated photo. The anther is where pollen is produced.
On winning the prize, Paves said: "I am honoured to receive this recognition and I'm excited for the opportunity to share my work broadly."
Take a look at the full collection, including 137 pictures from this year as well as notable entires from as far back as 1977 at the Nikon Small World website.
22,000 people agreed to clean toilets for WiFi because they did not read the terms.
Tools designed to ensure computer code in smart cars does not crash has been inspired by hungry penguins.
The rounded sleeping capsules send guests drifting into ocean before arriving on desert island by morning.
Sitting on the saddle activates the part of the brain responsible for learning, a study has claimed.
Scientists are appealing for more people to donate their brains for research after they die.
Life on Earth may have arrived from Mars on an asteroid, scientists have claimed.
Lunar mission scheduled at the end of 2017 could find out if beer can be brewed on the moon.
A bottle used to teach children how far litter can travel ended up on Scottish beach after 8,700-mile journey.