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One of two magnetic focusing horns used in the beamline at Fermilab that produces intense neutrino beams for MINERvA and other neutrino experiments.

For the first time, particle physicists have been able to precisely measure the proton’s size and structure using neutrinos with data gathered from thousands of neutrino-hydrogen scattering events collected by MINERvA, a particle physics experiment at the U.S. Department of Energy’s Fermi National Accelerator Laboratory.

A mile underground in South Dakota, construction crews have worked diligently to carve out an extensive network of caverns and tunnels that one day will house a huge neutrino experiment. Their efforts have paid off: With almost 400,000 tons of rock extracted from the earth, the excavation has reached the halfway point.

A new 20,000-pound particle detection system built for a neutrino experiment will be transported 3 miles across the Fermilab campus today. About the size of a small house, it will be the heart of the Short-Baseline Near Detector at Fermilab.