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This is a searchable collection of scientific photos, illustrations, and videos. The images and videos in this gallery are licensed under Creative Commons Attribution Non-Commercial ShareAlike 3.0. This license lets you remix, tweak, and build upon this work non-commercially, as long as you credit and license your new creations under identical terms.

Skin cancer cells (squamous cell carcinoma)

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This image shows the uncontrolled growth of cells in squamous cell carcinoma, the second most common form of skin cancer. If caught early, squamous cell carcinoma is usually not life-threatening. Markus Schober and Elaine Fuchs, The Rockefeller University View Media

Lily mitosis 13

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A light microscope image of cells from the endosperm of an African globe lily (Scadoxus katherinae). This is one frame of a time-lapse sequence that shows cell division in action. Andrew S. Bajer, University of Oregon, Eugene View Media

Gene silencing

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Pretty in pink, the enzyme histone deacetylase (HDA6) stands out against a background of blue-tinted DNA in the nucleus of an Arabidopsis plant cell. Olga Pontes and Craig Pikaard, Washington University View Media

Myotonic dystrophy type 2 genetic defect

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Scientists revealed a detailed image of the genetic defect that causes myotonic dystrophy type 2 and used that information to design drug candidates to counteract the disease. Matthew Disney, Scripps Research Institute and Ilyas Yildirim, Northwestern University View Media

Blinking bacteria

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Like a pulsing blue shower, E. coli cells flash in synchrony. Genes inserted into each cell turn a fluorescent protein on and off at regular intervals. Jeff Hasty, University of California, San Diego View Media

Multicolor STORM

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In 2006, scientists developed an optical microscopy technique enabling them to clearly see individual molecules within cells. In 2007, they took the technique, abbreviated STORM, a step further. Xiaowei Zhuang, Harvard University View Media

Wild-type and mutant fruit fly ovaries

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The two large, central, round shapes are ovaries from a typical fruit fly (Drosophila melanogaster). Vladimir I. Gelfand, Feinberg School of Medicine, Northwestern University. View Media

Ion channel

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A special "messy" region of a potassium ion channel is important in its function. Yu Zhoi, Christopher Lingle Laboratory, Washington University School of Medicine in St. Louis View Media

Epigenetic code (with labels)

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The "epigenetic code" controls gene activity with chemical tags that mark DNA (purple diamonds) and the "tails" of histone proteins (purple triangles). Crabtree + Company View Media

Histones in chromatin

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Histone proteins loop together with double-stranded DNA to form a structure that resembles beads on a string. Crabtree + Company View Media

Four timepoints in gastrulation

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It has been said that gastrulation is the most important event in a person's life. Bob Goldstein, University of North Carolina, Chapel Hill View Media

Introns

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Genes are often interrupted by stretches of DNA (introns, blue) that do not contain instructions for making a protein. Crabtree + Company View Media

RSV-Infected Cell

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Viral RNA (red) in an RSV-infected cell. Eric Alonas and Philip Santangelo, Georgia Institute of Technology and Emory University View Media

Dopamine D3 receptor

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The receptor is shown bound to an antagonist, eticlopride Raymond Stevens, The Scripps Research Institute View Media

Staphylococcus aureus aggregating upon contact with synovial fluid

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Staphylococcus aureus bacteria (green) grouping together upon contact with synovial fluid—a viscous substance found in joints. Paul Stoodley, The Ohio State University. View Media

Symmetrically and asymmetrically elongating cells

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Merged fluorescent images of symmetrically (left) or asymmetrically (right) elongating HeLa cells at the end of early anaphase (magenta) and late anaphase (green). Tomomi Kiyomitsu and Iain M. Cheeseman, Whitehead Institute for Biomedical Research View Media

Leptospira bacteria

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Leptospira, shown here in green, is a type (genus) of elongated, spiral-shaped bacteria. Infection can cause Weil's disease, a kind of jaundice, in humans. Tina Weatherby Carvalho, University of Hawaii at Manoa View Media

Normal vascular development in frog embryos

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In vivo vascular development in kdr:GFP frogs. Related to images 3403 and 3405. Hye Ji Cha, University of Texas at Austin View Media

Mature, flowering Arabidopsis

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This is an adult flowering Arabidopsis thaliana plant with the inbred designation L-er. Arabidopsis is the most widely used model organism for researchers who study plant genetics. Jeff Dangl, University of North Carolina, Chapel Hill View Media

Lily mitosis 05

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A light microscope image of a cell from the endosperm of an African globe lily (Scadoxus katherinae). This is one frame of a time-lapse sequence that shows cell division in action. Andrew S. Bajer, University of Oregon, Eugene View Media

Genetically identical mycobacteria respond differently to antibiotic 2

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Antibiotic resistance in microbes is a serious health concern. So researchers have turned their attention to how bacteria undo the action of some antibiotics. Bree Aldridge, Tufts University View Media

Pig trypsin (2)

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A crystal of porcine trypsin protein created for X-ray crystallography, which can reveal detailed, three-dimensional protein structures. Alex McPherson, University of California, Irvine View Media

Self-organizing proteins

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Under the microscope, an E. coli cell lights up like a fireball. Each bright dot marks a surface protein that tells the bacteria to move toward or away from nearby food and toxins. View Media

Cysteine dioxygenase from mouse

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Model of the mammalian iron enzyme cysteine dioxygenase from a mouse. Center for Eukaryotic Structural Genomics, PSI View Media

Finding one bug

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A nanometer-sized biosensor can detect a single deadly bacterium in tainted ground beef. How? Weihong Tan, University of Florida in Gainesville View Media

Podocytes from a chronically diseased kidney

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This scanning electron microscope (SEM) image shows podocytes--cells in the kidney that play a vital role in filtering waste from the bloodstream--from a patient with chronic kidney disease. Olga Troyanskaya, Princeton University and Matthias Kretzler, University of Michigan View Media

Planarian stem cell colony

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Planarians are freshwater flatworms that have powerful abilities to regenerate their bodies, which would seem to make them natural model organisms in which to study stem cells. Peter Reddien, Whitehead Institute View Media

NCMIR human spinal nerve

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Spinal nerves are part of the peripheral nervous system. They run within the spinal column to carry nerve signals to and from all parts of the body. Tom Deerinck, National Center for Microscopy and Imaging Research (NCMIR) View Media

Drosophila

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Two adult fruit flies (Drosophila) Dr. Vicki Losick, MDI Biological Laboratory, www.mdibl.org View Media

Yeast cell

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A whole yeast (Saccharomyces cerevisiae) cell viewed by X-ray microscopy. Inside, the nucleus and a large vacuole (red) are visible. Carolyn Larabell, University of California, San Francisco and the Lawrence Berkeley National Laboratory View Media

CRISPR surveillance complex

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This image shows how the CRISPR surveillance complex is disabled by two copies of anti-CRISPR protein AcrF1 (red) and one AcrF2 (light green). NRAMM National Resource for Automated Molecular Microscopy http://nramm.nysbc.org/nramm-images/ Source: Bridget Carragher View Media

Chang Shan

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For thousands of years, Chinese herbalists have treated malaria using Chang Shan, a root extract from a type of hydrangea that grows in Tibet and Nepal. Paul Schimmel Lab, Scripps Research Institute View Media

Cell-like compartments emerging from scrambled frog eggs 4

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Cell-like compartments that spontaneously emerged from scrambled frog eggs, with nuclei (blue) from frog sperm. Endoplasmic reticulum (red) and microtubules (green) are also visible. Xianrui Cheng, Stanford University School of Medicine. View Media

Chromatin in human fibroblast

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The nucleus of a human fibroblast cell with chromatin—a substance made up of DNA and proteins—shown in various colors. Melike Lakadamyali, Perelman School of Medicine at the University of Pennsylvania. View Media

Induced stem cells from adult skin 03

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The human skin cells pictured contain genetic modifications that make them pluripotent, essentially equivalent to embryonic stem cells. James Thomson, University of Wisconsin-Madison View Media

A molecular interaction network in yeast 2

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The image visualizes a part of the yeast molecular interaction network. Keiichiro Ono, UCSD View Media

Multivesicular bodies containing intralumenal vesicles assemble at the vacuole 2

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Collecting and transporting cellular waste and sorting it into recylable and nonrecylable pieces is a complex business in the cell. Matthew West and Greg Odorizzi, University of Colorado View Media

Central dogma, illustrated (with labels)

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DNA encodes RNA, which encodes protein. DNA is transcribed to make messenger RNA (mRNA). The mRNA sequence (dark red strand) is complementary to the DNA sequence (blue strand). Crabtree + Company View Media

Structure of heme, top view

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Molecular model of the struture of heme. Heme is a small, flat molecule with an iron ion (dark red) at its center. Rachel Kramer Green, RCSB Protein Data Bank View Media

Calling Cards in a mouse brain

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The green spots in this mouse brain are cells labeled with Calling Cards, a technology that records molecular events in brain cells as they mature. Allen Yen, Lab of Joseph Dougherty, Washington University School of Medicine in St. Louis. View Media

Cryo-EM reveals how the HIV capsid attaches to a human protein to evade immune detection

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The illustration shows the capsid of human immunodeficiency virus (HIV) whose molecular features were resolved with cryo-electron microscopy (cryo-EM). Juan R. Perilla, University of Illinois at Urbana-Champaign View Media

Egg comparison

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The largest human cell (by volume) is the egg. Human eggs are 150 micrometers in diameter and you can just barely see one with a naked eye. In comparison, consider the eggs of chickens...or ostriches! Judith Stoffer View Media

Section of an electron density map

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Electron density maps such as this one are generated from the diffraction patterns of X-rays passing through protein crystals. The Southeast Collaboratory for Structural Genomics View Media

Yeast cells responding to a glucose shortage

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These yeast cells were exposed to a glucose (sugar) shortage. Mike Henne, University of Texas Southwestern Medical Center. View Media

G switch (with labels)

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The G switch allows our bodies to respond rapidly to hormones. G proteins act like relay batons to pass messages from circulating hormones into cells. Crabtree + Company View Media

Histone deacetylases

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The human genome contains much of the information needed for every cell in the body to function. However, different types of cells often need different types of information. Amy Wu and Christine Zardecki, RCSB Protein Data Bank. View Media

X-ray crystallography (with labels)

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X-ray crystallography allows researchers to see structures too small to be seen by even the most powerful microscopes. Crabtree + Company View Media

Two-headed Xenopus laevis tadpole

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Xenopus laevis, the African clawed frog, has long been used as a research organism for studying embryonic development. Michael Klymkowsky, University of Colorado, Boulder View Media

Plasma-Derived Membrane Vesicles

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This fiery image doesn’t come from inside a bubbling volcano. Instead, it shows animal cells caught in the act of making bubbles, or blebbing. Jeanne Stachowiak, University of Texas at Austin View Media

Lysosomes

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Lysosomes have powerful enzymes and acids to digest and recycle cell materials. Judith Stoffer View Media