White cells in the bloodstream seek out and destroy invading bacteria. The explanation for the actual killing mechanism turns out to be wonderfully more subtle than previously thought. It is 120 years ...

Blue flower coloration is not determined by pigment production alone, but also by how pigments are transported and stored ...

Researchers are piecing together the unusual chemical reactions that enable dinoflagellates to create spectacular light displays in tropical bays. But the mechanism behind their bioluminescence remain ...

A single-celled parasite called Toxoplasma gondii has quietly infected roughly one-third of the global population, settling into brain tissue where it forms cysts that can persist for a lifetime. Most ...

Threading prior knowledge into new material makes for more durable learning. Here are 12 research-backed, teacher-tested strategies to help kids unpack what they already know.

Plant cells have several structures not found in other eukaryotes. In particular, organelles called chloroplasts allow plants to capture the energy of the Sun in energy-rich molecules; cell walls ...

Osmosis refers to the movement of water molecules only. The slideshow shows an example of osmosis showing the direction of movement of water between two different concentrations of sugar solutions. In ...