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This image shows a novel bifunctional catalyst for the Mannich reaction.

The giant star Zeta Ophiuchi is having a "shocking" effect on the surrounding dust clouds in this infrared image from NASA's Spitzer Space Telescope. Stellar winds flowing out from this fast-moving star are making ripples in the dust as it approaches, creating a bow shock seen as glowing gossamer threads, which, for this star, are only seen in infrared light.

These nanoparticles created by MIT engineers can act as synthetic biomarkers for disease. The particles (brown) are coated with peptides (blue) that are cleaved by enzymes (green) found at the disease site. The peptides then accumulate in the urine, where they can be detected using mass spectrometry.

Two different protein cages, cowpea chlorotic mottle virus (blue) and Pyrococcus furiosus ferritin (red), can be used to guide the assembly of binary nanoparticles superlattices through tunable electrostatic interactions with charged gold nanoparticles (yellow).

This still image and animation shows the final flight path for NASA's twin Gravity Recovery and Interior Laboratory (GRAIL) mission spacecraft, which will impact the moon on Dec. 17, 2012, around 2:28 p.m. PST.

Animated illustration show the precise arrangement of atoms in dislocations in two-dimensional molybdenum/sulfur. Dislocations happen when two growing blooms of material come together at different angles in chemical vapor deposition. At a specific angle, the lines along which these dislocations form can become conductive.