Beneath the surface of every living being lies a world more vibrant and mysterious than we ever imagined. These images, created by scientists using microscopes, reveal the stunning beauty of life on the smallest scale. This gallery invites you to explore five realms. Each is a window into the powerful systems that make life possible.
CORAL REEFS OF THE MIND
Where thoughts sparkle like fish in a sea of neurons.
Inside your brain, a coral reef of activity is always at work. Neurons light up as you think, move, and feel. These cells connect like glowing sea creatures in an electric current. Some provide support, others carry signals, but all work together to create your unique mind. These images, from fruit flies to human brains, show the beauty of how we think.
Try this: Can you spot the "spark" of a thought? What might this brain cell be thinking? If your thoughts swam like fish in a reef, what kind would they be?
NEURAL NETWORK: HUMAN NEURONS
This image, taken by Dr. Louis Dang, shows human cortical-like neurons (green) co-cultured with rat glial cells (red), which help support and nourish them. The neurons extend long projections that connect to form a complex network, similar to the circuits in our brains. Studying how these networks function, especially in cases of genetic epilepsy, can help researchers develop more effective treatments for seizure disorders.
Fly Control: Nervous system of A fruit fly larva
Captured by Dr. Bing Ye, this image shows the intricate nervous system of a fruit fly larva. The nerves appear in red, while green highlights specialized neurons that detect harmful stimuli. Researchers recently discovered that a protein within these green neurons—called DSCAM (Down’s Syndrome Cell Adhesion Molecule)—helps determine how the neurons connect with one another. Because DSCAM is conserved across species from flies to humans, studying it in fruit flies provides valuable insight into its role in human neurological conditions such as Down syndrome.
HIPPO CROSSTALK: NEURONS IN A PETRI DISH
Dr. Pilar Rivero-Ríos captured this image of rat hippocampal neurons cultured in a dish. The hippocampus—named after the Greek word for seahorse—is a brain region essential for memory, emotional regulation, and spatial navigation. In this image, the neurons extend branching projections that form synapses, the connections that enable communication between cells. By studying how these neurons signal to one another in the lab, scientists can better understand how the brain processes and stores information.
NEURAL NURSES: ASTROCYTES
This image, created by Teresa Patitucci, shows astrocytes—star-shaped cells (in red) that support the brain and help form the blood-brain barrier. These astrocytes were derived from a patient’s skin cells and grown in the lab, allowing researchers to study how they contribute to neurological conditions such as spinal muscular atrophy. Because astrocytes cannot be taken directly from patients, this lab-based approach provides valuable insight into disease development.
SWAN SONG: HUMAN NEURONS
Dr. Xiaofeng Zhao captured this mirrored image of a developing mouse brain. Blue marks the nuclei of brain cells, green highlights a subset of neurons, and magenta reveals migrating neurons—including those that will form the hippocampus, a brain region vital for learning and memory. The magenta clusters in the “swans’ beaks” indicate the future hippocampus. By studying how these neurons migrate and organize into structures, researchers hope to better understand how disruptions in brain development may contribute to psychiatric disorders.
THE LAVA FIELD OF INFLAMMATION
Where the body battles infection and heals itself.
When something goes wrong in your body, your immune system leaps into action. It sends cells to fight, fix, and rebuild. These images show the heat of healing: glowing barriers, flashes of regeneration, and fiery defense systems at work. It’s beautiful, powerful, and happening inside you right now.
Try this: Who’s the hero here? Can you find the immune cell rushing to the rescue? If this scene were a battle, what would you name it?
INVADING MY SPACE: CANCEROUS LUNG
This image, captured by Dr. Deborah Gumucio and Dr. Kate Walton, shows the edge of a lung adenocarcinoma (bottom) invading healthy lung tissue (top). Adenocarcinomas are the most common type of non–small cell lung cancer, particularly among non-smokers. The brown stain highlights a protein called TTF1, which is used to help diagnose this cancer. Normal lung cells show only faint staining, while cancer cells appear darkly marked—evidence of the tumor’s aggressive spread. Studying this process helps researchers improve early detection and treatment of lung cancer.
RETINAL REGENERATOR: ZEBRAFISH EYE CELLS
Captured by Dr. Xiaofeng Zhao, this image shows the eye of a zebrafish—a species remarkable for its ability to regenerate damaged retinal cells. The rod-shaped Müller glia cells pictured here play a central role in that repair process by dividing to replace lost neurons. Humans also have Müller glia, but instead of aiding regeneration, these cells typically form scars. By studying how zebrafish repair their retinas, scientists hope to uncover ways to activate similar regenerative pathways in the human eye.
Building a wall: Protective gut cell
This image, created by Dr. Kathleen Ignatoski, shows gut epithelial cells—the protective layer that forms a vital barrier between the body and its environment. The green staining highlights a protein called Ankyrin-G, which helps keep these cells tightly connected. This barrier shields the body from harmful bacteria such as Clostridium difficile, a pathogen that can cause severe inflammation of the colon, while also supporting trillions of beneficial microbes that aid digestion and metabolism. Studying how this barrier functions can lead to better treatments for gut-related diseases and infections.
Prometheus Regenerated: Mouse Liver
Captured by Teresa Patitucci, this image shows the vascular system of a mouse liver after all the cells have been removed, leaving only the network of blood vessels behind. The liver carries out more than 500 vital functions, including detoxifying the blood, producing proteins, and storing energy. To support these tasks, it relies on a dense and intricate web of vessels like the one seen here. Studying this structure helps researchers better understand how the liver regenerates and sustains its essential functions.
Fire Up: Mouse brain cells
This image, created by Ra Kohen, shows developing mouse brain cells from the hippocampus—the brain’s center for learning and memory. Cultured in a 3D matrix, the cells extend red projections to explore their environment while their yellow-stained cell bodies migrate through the space. This movement is essential for forming healthy brain circuits, but genetic mutations can disrupt the process, contributing to psychiatric disorders such as schizophrenia and bipolar disorder. Studying how these cells migrate may reveal new avenues for treatment.
THE ENCHANTED GARDEN OF GROWTH
Where life renews itself, one cell at a time.
Welcome to a hidden garden where cells grow, divide, and create. These images show nature’s construction zones: tubes forming, tissues regenerating, and cells branching like trees. Whether it’s the reproductive system or smooth muscle, every part of you has a plan for growth. These cells make it happen.
Try this: Which cell do you think is building something new? What might it become? Imagine this is a microscopic garden—what would you name it?
Daedalus’s Labyrinth: Reproductive
This image, captured by Lily Oles and Dr. Kenneth Lewis, shows the epididymis—a coiled tube in the male mouse reproductive tract. Sperm produced in the testis mature as they travel through this complex network of tubules before being transported during ejaculation. In the mirrored image, green highlights the ductal epithelial cells that line the tubes, while red marks the smooth muscle cells that help propel sperm forward. Studying this intricate structure helps scientists understand how sperm development and movement are regulated.
Fire in the Forrest: Mouse skin cells showing DNA damage
Captured by Dr. Raji Nair, this image shows mouse skin cells (keratinocytes, in green) responding to DNA damage caused by radiation. The cell nuclei appear in orange, while yellow spots highlight a histone protein called gamma-H2AX, which accumulates at sites of DNA breaks. This response enables cells to repair damage from harmful exposures such as UV light. By studying when this repair process succeeds or fails, researchers hope to gain insight into how skin cancer develops.
Tubing: Branched tubes formed by stem cells
The University of Michigan College of Engineering created this image of human embryonic stem cells forming branched tubes in culture. Under the right conditions, these versatile cells can self-organize into structures like cysts or tubes, mimicking early stages of organ development. These engineered tubes provide a valuable model for studying how organs—such as the lungs, kidneys, and intestines, all of which depend on tubular architecture—form and function, with potential applications in regenerative medicine.
Smooth Operator: Engineered smooth muscle cell
This image, captured by Yue Shao, shows a smooth muscle cell grown in the lab from human embryonic stem cells. Smooth muscle is found in organs such as the digestive and urinary systems, yet much about its development remains unknown. Culturing these cells provides a new way to study smooth muscle biology and could help advance our understanding of, and treatments for, muscle-related diseases.
Obsoleta Beautiful: Cells of a snail embryo
Dr. Marcus Kilwein captured this image of an 8-cell mud snail embryo (Tritia obsoleta) to study how nutrients are distributed during early development. Protein-storing organelles appear in cyan, while fat-storing organelles are shown in magenta. Each cell inherits a unique balance of nutrients—some mostly protein, others mostly fat, and some a mixture. Since each cell will develop into different tissues, this tailored nutrient allocation may help guide early tissue formation. Mud snail embryos provide a valuable model for studying these processes without the ethical constraints of human embryo research.
Innovation of Nature
Where nature inspires new ways to heal and build.
By studying how cells grow and heal, scientists have created powerful new tools. These images show tissue scaffolds, lab-grown organs, and pollution-fighting particles. These are amazing inventions based on biology itself. Nature is our best engineer, and the future of medicine may lie in learning from it.
Try this: What natural power would you borrow to solve a problem in the world? Can you tell what part is made by humans and what part is made by nature?
Nanoengineering: Engineered scaffold for tissue regeneration
This image, created by Seth Woodbury, shows a synthetic scaffold designed to support tissue regeneration. While some tissues, like skin, can repair themselves, others require additional help. In regenerative medicine, bioengineered scaffolds act as temporary frameworks that guide stem cells to grow, divide, and rebuild damaged tissue. The scaffold in this image is made from a special material that forms nanofibers during fabrication. These fine structures promote cell attachment and growth, making the scaffold an ideal platform for repairing tissues that cannot heal on their own.
Cellular Microjewelry: Dental scaffolding with human cells to rebuild gums
This image shows a bioengineered scaffold designed to rebuild gum tissue. In cases of periodontitis, where gums recede and expose tooth roots, this approach offers an alternative to surgical grafts. The scaffold mimics the natural 3D structure of gum tissue and is seeded with human periodontal ligament cells, which grow in organized sheets along the fibers. Once implanted, the scaffold gradually degrades while the cells drive tissue regeneration, creating a living repair system that is both functional and visually striking under the microscope.
Pyrite Reef: Engineered particles for pollution degradation
This image, created by Naomi Ramesar, shows iron sulfide particles breaking down lignin, a tough byproduct of paper production. The engineered particles start as fibrous structures and then self-assemble into spherical clusters, visible here at an intermediate stage. By interacting with lignin, they help convert industrial waste into usable biofuel, providing a sustainable approach to pollution. The image is false-colored to evoke the coral reefs of Trinidad and Tobago, linking environmental engineering with natural beauty.
Healing Crosstalk: Organoids and engineered tissues
This image, created by Nicholas Schott, shows a lab-grown tissue system designed to mimic blood vessels. A major challenge in tissue engineering is creating functional vasculature. In this system, endothelial cells—which form blood vessels (red)—are cultured with mesenchymal stem cells—which support tissue growth (green)—within a fibrin hydrogel. Over time, the cells form complex, branching vessels, while the stem cells mature into smooth muscle to stabilize the network. This dynamic interaction supports long-term tissue health and regeneration.
The Void Between Worlds
Where mystery flows through the gaps between.
In the space between tissues lies a universe of unknowns. These voids carry signals, store secrets, and spark sensations like pain, smell, and memory. In this cosmic realm, nothing is empty. Every shadow holds a story. Scientists are just beginning to understand what goes on here.
Try this: What do you see in the shadows? A galaxy? A ghost? A signal? What question would you ask if you could send a message through this strange space?
Ichabod’s Kidney: Mouse kidney
This image, captured by Dr. Ramon Ocadiz, shows a glomerulus, the kidney’s filtration unit. Each human kidney contains about one million glomeruli, which filter blood by letting water and small molecules pass while retaining blood cells and proteins. In this section of mouse kidney tissue, the glomerulus happens to resemble a screaming face—a fitting coincidence, as the photograph was taken on Halloween 2014.
Interface: Junction between muscle and tendon
This image, created by Pablo Moncada, shows the junction where muscle connects to tendon. To generate movement, muscles must transfer force to bones, but the difference in stiffness between soft muscle and rigid bone requires a transitional tissue: the tendon, which can withstand tension and stress. Using special filters that visualize how tissues bend light, the dark area highlights muscle, while the bright fibers represent tendon, revealing the engineered interface that allows our bodies to move efficiently.
Dust Bunnies: Particles designed to help clean oil
This image, created by Dr. Joong Hwan Bahng, shows spiky micro-particles formed by growing zinc oxide on polystyrene beads (color added). Originally designed for water-repellent applications, these particles unexpectedly dispersed well in water—a discovery that revealed their potential for cleaning up oil. These tiny “dust bunnies” can break down oily substances and may one day replace toxic solvents in paints or help remediate oil spills, turning a lab surprise into an environmental solution.
Pain Circuit: Fruit fly pain neurons
Created by Takuya Kaneko, this image shows the pain-sensing neurons of a fruit fly larva. These neurons extend throughout the larva’s body, transmitting pain signals to the central nervous system and forming a colorful, ladder-like pattern. The vibrant colors come from “Brainbow,” a technique developed at Michigan that genetically assigns different hues to individual neurons. This method allows scientists to trace how nerve cells grow and connect, providing insights into the formation of pain circuits.
Odorabunt Spectro: Olfactory neurons
This image, captured by Dr. Jeremy McIntyre, shows olfactory neurons—the cells responsible for detecting smells. The hair-like cilia extending from each neuron, visible here in high detail, are essential for capturing scent molecules from the air. Damage or loss of these cilia can lead to a reduced or lost sense of smell. Studying these structures helps researchers understand how the olfactory system functions and may inform new treatments for smell disorders.