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This is a long time exposure photography viewing from Tenerife to La Palma. A green laser beam indicates the free-space link between the two laboratories.

Surface of a tooth, with two large scratches (dark blue lines) that have been caused by quartz particles.

A 2-dimensional vision of the solar wind turbulence at the smallest scale seen yet, thanks to observations by Cluster satellites. The approximate location of the measurements is indicated on a graphic illustrating features of Earth’s magnetic environment. The inset shows conditions as would be seen facing the solar wind, with current sheets forming at the border of turbulent eddies. The trajectory of the Cluster spacecraft is marked on the inset by the black line and the color gradients represent the magnetic field strength intensity.

This illustration (not to scale) simulates the process by which an incoming complex wave can be identified and transmitted to a photodetector.

A preference for diving head first When a DNA strand is captured and pulled through a nanopore, it’s much more likely to start the journey at one of its ends (top left) rather than being grabbed somewhere in the middle and pulled through in a folded configuration.

This artist's concept envisions what hydrocarbon ice forming on a liquid hydrocarbon sea of Saturn's moon Titan might look like.

This image from the Mars Hand Lens Imager (MAHLI) on NASA's Mars rover Curiosity shows the patch of rock cleaned by the first use of the rover's Dust Removal Tool (DRT).