Image of the Day

Drunken crayfish will roll on their backs and enthusiastically perform tail flips in their tanks. The animals are more likely to display they behaviors after spending time in a social environment compared with an isolated one.

Thecla opisena butterfly wings get their unique luster from the crystalline structures in their scales (bottom right).

Placentas from mice with genetically distinct immune systems, stained to highlight differences in three proteins, representing the nucleus (blue), blood vessels (red), and trophoblasts (green)

Emperor penguins are among the largest birds in the world. Approximately 595,000 of them live in Antarctica.

On April 22, thousands of people took to the streets to take part in Marches for Science around the world.

By sequencing and analyzing the genomes of more than 20 species of Penicillium fungi, researches uncovered genes encoding for numerous bioactive compounds, including antibiotics.

Kuphus polythalamia is a worm-like mollusk that can reach up to 155 cm in length, is encased in a hard, tusk-like shell, and lives in sulfur-rich mud.

Phyllomedusa bicolor is a nocturnal, tree-dwelling frog that lives in the Amazon rainforest.

Transcytosis, suppression of vesicle traffic across cells, helps reduce permeability in the blood-retinal barrier during development.

Poisonous fang blennies (Meiacanthus) are only around 2 inches long but, with their tiny fangs, they can inject predators with a venom that has potent hypotensive effects.

Transcriptomic analyses of a patient with severe Ebola virus disease revealed shifts in the expression of antiviral and immune response genes, corresponding to the stages of illness.

By rapidly snapping its large claw shut, the newly discovered pistol shrimp, Synalpheus pinkfloydi, can create enough sonic energy to stun—even kill—small fish.

These fossilized red blood cells (right), found in an ancient, blood-engorged Amblyomma tick (left), likely belonged to primates.

Unlike related species, Ovatiovermis cribratus, a lobopodian from the Cambrian period, did not have a hard, protective shell.

After an inflammatory injury occurs in the brain, astrocytes release extracellular vesicles that travel to the liver and trigger an immune response.

Researches develop a human monoclonal antibody against two filoviruses, Marburg and Ravn, which, like Ebola, can cause hemorrhagic fever.

An NIH survey of 351 individuals in the research community has shown that many are supportive of interim research products like preprints.

Single-celled dinoflagellates (Polykrikos) use harpoon-like organelles to hunt and capture prey.

Following treatment with a migraine drug, blind tadpoles were able to process visual information through eyes transplanted onto their tails.

Cuts to federal science funding could significantly impact undergraduate students, graduate students, postdocs, and other early-career researchers.