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Using data collected more than two decades ago, scientists from the Johns Hopkins Applied Physics Laboratory (APL) in Laurel, Maryland, have compiled the first complete map of hydrogen abundance on the Moon’s surface. The map identifies two types of enhanced hydrogen-containing lunar material and corroborates previous ideas about lunar hydrogen and water, including the finding that water likely played a role in the formation and solidification of the Moon’s native ocean-magma. David Lawrence, Patrick Peplowski and Jack Wilson of APL, along with Rick Elphic of NASA’s Ames Research Center, used orbital neutron data from the Lunar Prospector mission to create their map. The probe, deployed by NASA in 1998, orbited the Moon for a year and a half and sent back the first direct evidence of an increase in hydrogen at the lunar poles, before hitting the lunar surface. When a star explodes, it releases cosmic rays, or high-energy protons and neutrons that travel through space...

The findings were published June 22 in JCI Insight. “We believe this is the first time that impaired cardiac metabolism in people has been associated with an increased risk of life-threatening arrhythmias or sudden cardiac death,” said study senior author Robert Weiss, MD, professor of medicine at Johns Hopkins University School. Medical. “This could open a window for an entirely new approach, a metabolic approach to treat or prevent severe arrhythmias, which are not currently available in cardiology.” Sudden cardiac death accounts for 50% of all cardiovascular deaths in the United States, claiming more than 300,000 American lives each year, according to the American Heart Association. Currently, an implantable cardioverter-defibrillator (ICD) – a small, battery-powered device that is placed in the chest to detect and stop irregular heart rhythms – is the main way to prevent SCD in high-risk patients. The device continuously monitors the heart rhythm and deli...