Bloomberg American Health Initiative Announces 10th Cohort of Fellows Working to Address Critical U.S. Health Challenges | Johns Hopkins Bloomberg School of Public Health
When scientists announced Webb’s first definitive detection of Neptune’s auroras in March 2025, they revealed another surprise: observations taken in 2023 showed that the planet’s upper atmosphere had cooled by several hundred degrees since Voyager 2 visited in 1989—and scientists still don’t know exactly why.
A 60-beam ultraviolet laser flash-vaporized the surface of tiny diamonds so the blast would kick a shock wave through them, melting the hardest material on Earth at 12,680 degrees and 145 million psi, and solid diamond turned out to float on its own melt like ice on water
Scientists who read 16 years of radio tracking from three Mars orbiters say the mantle beneath the planet's southern highlands runs 200 to 400 degrees Celsius hotter, averaged over the whole depth of the mantle, than the mantle beneath the northern plains, an inference drawn from the way Mars flexes under the Sun across each Martian year