Trichodina, known in Czech as brousilka, parasitizes aquatic animals, especially fish. The photograph was taken in collaboration with Jan Petr, Ph.D., Department of Biology, Faculty of Education, University of South Bohemia in České Budějovice, during the preparation of photographic documentation for the new edition of the textbook Biology of Cells by author Radka Závodská, Ph.D

Different shape variations of radiolarian shells (Radiolaria). Decorative shells with large openings are made of silicon dioxide. The photograph was taken in collaboration with Jan Petr, Ph.D., Department of Biology, Faculty of Education, University of South Bohemia in České Budějovice, during the preparation of photographic documentation for the new edition of the textbook Biology of Cells by author Radka Závodská, Ph.D.

Glycoprotein secreted by flaviviruses (dengue, Zika, yellow fever) alters the permeability of human endothelial cells (causing uneven distribution of endothelial glycocalyx components). These components are stained using a fluorophore-conjugated marker. The photograph was taken during work on a project by RNDr. Martin Palus, Ph.D., Arbovirology Laboratory, Institute of Parasitology, Biology Center of the Czech Academy of Sciences.

Glycoprotein secreted by flaviviruses (dengue, Zika, yellow fever) alters the permeability of human endothelial cells (causing uneven distribution of endothelial glycocalyx components). These components are stained using a fluorophore-conjugated marker. The photograph was taken during work on a project by RNDr. Martin Palus, Ph.D., Arbovirology Laboratory, Institute of Parasitology, Biology Center of the Czech Academy of Sciences.

Cross-section of a leaf of the alpine shrub Ajania fructiculosa under a transmission electron microscope. The green color indicates chloroplasts, orange indicates multi-vesicular bodies. In collaboration with Alexey Bondar, Laboratory of Microscopy and Histology, Entomological Institute, Biology Center of the Czech Academy of Sciences, on a project by Jiří Doležal, Botanical Institute of the Czech Academy of Sciences, Třeboň Branch.

Cross-section of a poplar leaf, stained using the Masson Trichrome technique. The cross-section shows red palisade and blue spongy parenchyma and a vascular bundle in the middle. The photograph was taken during work on a project by Dagmar Sirová, Hydrobiological Institute, Biology Center of the Czech Academy of Sciences.

Detailed image of a poplar leaf section, stained using the Masson Trichrome technique. The photograph was taken during work on a project by Dagmar Sirová, Hydrobiological Institute, Biology Center of the Czech Academy of Sciences.

An early antral oocyte in the ovary of a 4-month-old guinea pig resembles a smiling figure filled with hearts/flower, with DDX4/VASA-positive cytoplasm (green) and DAPI-stained nuclei (blue) creating a joyful portrait of germ cell identity at the onset of antral follicle formation.

Pseudocoloured mouse (E4.5) blastocysts.

A rarely captured acanthocephalan parasite from an Indonesian snake, where the precise repetition of hook-like structures transforms an elusive organism into a striking sculptural form.

Smooth slug snake (Asthenodipsas laevis) from Danum Valley, Sabah, Malaysia, showing its slender brown body and smooth scales as it rests on foliage at night.

Whiskered Treeswift perching alertly in Danum Valley, its crisp white facial stripes and sleek plumage sharply outlined against the dark forest backdrop.

Cluster of bioluminescent mushrooms, likely a green-glowing Mycena species, photographed at night on the forest floor of Maliau Basin, Sabah, Malaysia.

Flamingos in space or moss capsules (Plagiomnium sp.) under a fluorescence microscope.

The beauty of a forest gem, or a cross-section of a spruce needle.

Hidden variability forming a mosaic – variations in cross-section of spruce, Scots pine, black pine, and thuja needles.