The 10th place entry was actually a video, which can be viewed in full here . The footage shows a Paramecium in action.

These are the head and legs of a caddisfly larva, a European and North American genus of insects whose larvae live in fresh water, in gravel, stones or sand.

This entry, titled "Brother bugs," shows a pair of Gonocerus acuteangulatus that are just two hours old and 3 millimetres in size.

Dylan Burnette captured this image of mouse embryonic fibroblasts showing the actin filaments (red) and DNA (blue).

This is a view of a black mastiff bat embryo (Molossus rufus), at the "Peek-a-boo" stage when its wings have grown to cover its eyes.

Igor Siwanowicz took this photo of the open trap of an aquatic carnivorous plant called a humped bladderwort (Utricularia gibba). The floating plant digests microinvertebrates that are sucked into its trap a millisecond after they touch its trigger hairs.

The natural world is filled with wonders large and small — the Olympus BioScapes International Digital Imaging Competition focuses in on the latter.

Winners for the 10th edition of the photo competition were announced today. All of the pictures were captured using microscopes.

A panel of four judges scored the entries based on technical proficiency involved in capturing the images, overall beauty or impact of the subject, and the science depicted in the image.

Winners included pictures of bat and mouse embryos, kaleidoscopic collections of algae and super-close-ups of insect body parts. Click through the gallery above to see the top 10 entries selected in this year's contest.