The dark spots on the leaves of these tomato plants are a symptom of infection caused by the plant pathogen Pseudomonas syringae. The bacteria spread infection by water-logging the spaces between cells in the plant’s leaves, creating a moist, cozy place to feed and multiply. Credit: Goldlocki, Wikimedia Commons
Without a mirror, it can be hard to tell if you’re blushing, or have spinach in your teeth. But one color-changing fish has evolved a clever way to keep watch on the parts of itself that lie outside its field of view -- by sensing light with its skin. Credit: James St. John, via Wikimedia Commons
Packed with microscopic Plasmodium parasites, this red blood cell (teal) and other infected cells around it will soon burst and spew their contents into the bloodstream, triggering the periodic fevers that are the hallmark of malaria. Credit: NIAID
Found in lakes and rivers worldwide, single-celled creatures like these Paramecium bursaria can both eat and photosynthesize. Microbes like this play a double role in climate change, releasing or absorbing carbon dioxide -- the heat-trapping greenhouse gas that is the primary driver of warming -- depending on whether they rely on an animal-like lifestyle or a plant-like lifestyle. Credit: Daniel J. Wieczynski.
Designing an inclusive smart city: Duke researcher Pardis Emami-Naeini wants to make sure the ‘smart cities’ of the future are designed with residents firmly in mind. Photo by John West/Trinity Communications