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This photograph of the meteor streaking through the sky above Chelyabinsk, Russia, on Feb. 15, 2013, was taken by a local, M. Ahmetvaleev. The small asteroid was about 56 to 66 feet (17 to 20 meters) wide.

Female anopheles mosquito.

Penn State researchers working with the Army Research Office showed that tungstenite formed from layers of sulfur and tungsten atoms has light-emitting properties that could be useful to plenty of Army applications, like optical sensors or even lasers.

The tiny red spot in this image is one of the most efficient star-making galaxies ever observed, converting gas into stars at the maximum possible rate. The galaxy is shown here in an image from NASA's Wide-field Infrared Survey Explorer (WISE), which first spotted the rare galaxy in infrared light.

Images illustrate how collective spin excitations behave under the effect of the spin-orbit field, with and without external magnetic field.

The correlated electron metal SrRuO3 exhibits strong visible slight absorption. Overlaid here on the AM1.5G solar spectrum, it can be seen that SrRuO3 absorbs more than 75 times more light than TiO2. The structural, chemical, and electronic compatibility of TiO2 and SrRuO3 further enables the fabrication of heterojunctions with exciting photovoltaic and photocatalytic response driven by hot-carrier injection.

The HyspIRI airborne campaign overflew California's San Andreas Fault on March 29, 2013. The three-color (red, green, blue) composite image of the fault (left), composed from AVIRIS data, is similar to what a snapshot from a consumer camera would show. The entirety of data from AVIRIS, however, spans the visible to the short-wavelength infrared part of the spectrum. Temperature information (right) was collected simultaneously by the MASTER instrument. Red areas are composed of minerals with high silica, such as urban areas, while darker and cooler areas are composed of water and heavy vegetation.

This image is a composite of 25 separate images spanning the period of April 16, 2012, to April 15, 2013. It uses the SDO AIA wavelength of 171 angstroms and reveals the zones on the sun where active regions are most common during this part of the solar cycle.

Two different devices based on the herringbone pattern were presented in the Science paper: a rectangular array and a ring-shaped array (both interpreted in this illustration). Circularly polarized light with waves that wind in opposite directions gets split by both devices, with its waves routed in opposite directions. For a ring-shaped coupler, this means that plasmons are channeled either toward or away from the center of the structure. Intensity at the center of the ring can therefore be switched on and off by manipulating the polarization of the incoming light.