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This is the delivery and activation of genes by gold nanorods. Gold nanorods coated with charged lipids efficiently bind to DNA and penetrate cells. The team designed an artificial gene that is turned on by heat generated by the gold nanorods upon exposure to near infrared light illumination.

When the universe was young, stars formed at a much higher rate than they do today. By peering across billions of light-years of space, Hubble can study this early era. But at such distances, galaxies shrink to smudges that hide key details. Astronomers have teased out those details in one distant galaxy by combining Hubble’s sharp vision with the natural magnifying power of a gravitational lens. The result is an image 10 times better than what Hubble could achieve on its own, showing dense clusters of brilliant, young stars that resemble cosmic fireworks.

he sample here contains hundreds of thousands of nanoparticles that manipulate the incoming light.

The motion of a tennis racket in the air can help predict the behavior of quanta. While the racket rotates 360 degrees about its lateral axis, the tennis racket effect leads to an unintentional 180-degree flip about its longitudinal axis. The overall rotation leaves the red, bottom side facing upward.

This image shows a thin-walled jar with a groove; isometric view with a cut (left) and cross section (right).

Using the supersharp radio “vision” of the National Science Foundation’s Very Long Baseline Array (VLBA), astronomers have made the first detection of orbital motion in a pair of supermassive black holes in a galaxy some 750 million light-years from Earth.

he International Space Station, as seen from space shuttle Atlantis in 2011.

(left) This is a picture of a front cone, a circular cone-shaped spectrometer component, taken from above. The 30 μm aperture created at the tip is the port where photoelectrons enter the spectrometer. (right) The peaks represent the photoelectron spectroscopic signals of gold thin film detected under atmospheric pressure of air.

The Pancam on NASA's Mars Exploration Rover Opportunity took the component images of this enhanced-color scene during the mission's "walkabout" survey of an area just above the top of "Perseverance Valley," in preparation for driving down the valley.

Single spins in silicon carbide absorb and emit single photons based on the state of their spin.