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The world's most expensive peashooter, the Large Hadron Collider (LHC), is now chewing on meatier payloads. Last week, the giant proton accelerator successfully transitioned to lead nuclei—over two hundred times as massive as the hydrogen nuclei that made up its previous diet.

Astronomers estimate that half of the star formation in the universe is obscured by dust—making many distant galaxies in the peak of their star-forming years essentially invisible. But now the invisible has been revealed, thanks to new instruments that can observe in the millimeter, submillimeter, and far-infrared wavelengths in which these galaxies shine.

As a kid, Assistant Professor of Astronomy John Johnson wasn't interested in astronomy—or even science for that matter. But now, as an assistant professor of astronomy, he's discovering entirely new worlds. In an interview, he talks about the search for planets and the rapidly evolving field of exoplanet astronomy.

Amnon Yariv, the Martin and Eileen Summerfield Professor of Applied Physics and professor of electrical engineering—a pioneer in the field of optoelectronics—has been named one of 10 recipients of the National Medal of Science, the highest honor bestowed by the United States government on scientists.

John O. Dabiri, a fluid-dynamics expert at Caltech whose studies of schooling fish have inspired new ideas for wind farming, was named a MacArthur Fellow, and awarded a five-year, $500,000 "no strings attached" grant. Each year, the John D. and Catherine T. MacArthur Foundation awards the unrestricted fellowships to individuals who show "exceptional creativity in their work and the prospect for still more in the future," according to the Foundation's website.

Using a diamond-anvil cell to recreate the high pressures deep within the earth, researchers at the California Institute of Technology (Caltech) have found unusual properties in an iron-rich magnesium- and iron-oxide mineral that may explain the existence of several ultra-low velocity zones (ULVZs) at the core-mantle boundary. A paper about their findings was published in a recent issue of Geophysical Research Letters (GRL).

Computational scientists and geophysicists at the University of Texas at Austin and Caltech have developed new computer algorithms that for the first time allow for the simultaneous modeling of the earth's mantle flow, large-scale tectonic plate motions, and the behavior of individual fault zones, to produce an unprecedented view of plate tectonics and the forces that drive it.

The National Research Council (NRC) has strongly recommended the Laser Interferometer Space Antenna (LISA) as one of NASA's next two major space missions, to start in 2016 in collaboration with the European Space Agency (ESA). LISA will study the universe in a manner different from any other space observatory, by observing gravitational waves. The recommendation was announced August 13 in a press conference at the Keck Center of the National Academies in Washington, D.C.

In an announcement August 13, the National Research Council recommended three space- and ground-based astronomy and astrophysics projects with potential major roles for researchers at Caltech: CCAT, a giant submillimeter telescope that will help unravel the origins of stars, planets, and galaxies; LISA, designed to detect gravitational waves; and the development of a Giant Segmented Mirrored Telescope—the Thirty Meter Telescope being one of two such telescopes under development.