sci-news.com – Plasmas are naturally formed at high temperatures, such as those reached in the interiors of stars. Neutral plasmas consist of equal numbers of positive ions and electrons. In recent experiments, a team of physicists at Rice University worked with a cold neutral plasma created out of atoms of strontium that were ionized by laser light. The team used lasers to cool the ions down to about 50 mK (millikelvin), a breakthrough that could lead to simulators for exotic states of matter that occur...
Source: Thomas K. Langin, Grant M. Gorman, Thomas C. Killian. Laser cooling of ions in a neutral plasma. Science, 2019.
cbc.ca – In recent decades, the Earth's magnetic north pole has drifted rapidly from Canada's coast toward Russia, causing navigation issues. That has prompted the U.S. military to ask scientists to compensate for its changing position.
Source: Alexandra Witze. Earth’s magnetic field is acting up and geologists don’t know why. Nature, 2019.
livescience.com – Antarctica is losing ice six times faster than it was four decades ago. That’s not good for our oceans.
Source: Eric Rignot, et al. Four decades of Antarctic Ice Sheet mass balance from 1979–2017. Proceedings of the National Academy of Sciences, 2019.
theguardian.com – Fast radio bursts have caused more suspicion about extraterrestrial activity
Source: A second source of repeating fast radio bursts. Nature, 2019.
nytimes.com – Astronomers have identified a second set of odd radio bursts from the distant universe. Aliens probably aren’t causing it, but what is?
Source: Observations of fast radio bursts at frequencies down to 400 megahertz. Nature, 2019.
nytimes.com – Users aged 65 and older posted seven times as many articles from fake news sites as adult users 29 and younger, a study published this week found.
Source: Andrew Guess, Jonathan Nagler, Joshua Tucker. Less than you think: Prevalence and predictors of fake news dissemination on Facebook. Science Advances, 2019.
mashable.com – An ancient woman's teeth held the clues.
Source: A. Radini, et al. Medieval women’s early involvement in manuscript production suggested by lapis lazuli identification in dental calculus. Science Advances, 2019.
zmescience.com – It's a simple thing that can make a big difference -- especially for low-income children.
Source: Christopher S. Rozek, Gerardo Ramirez, Rachel D. Fine, Sian L. Beilock. Reducing socioeconomic disparities in the STEM pipeline through student emotion regulation. Proceedings of the National Academy of Sciences, 2019.
discovermagazine.com – There's been good evidence that the oceans were heating up faster than thought. Now, scientists have fitted the puzzle pieces together.
Source: Lijing Cheng, John Abraham, Zeke Hausfather, Kevin E. Trenberth. How fast are the oceans warming?. Science, 2019.
discovermagazine.com – TESS has found two intriguing and newfound planets orbiting a small star some 50 light-years away.
Source: Diana Dragomir, et al. The Longest Period TESS Planet Yet: A Sub-Neptune Transiting A Bright, Nearby K Dwarf Star. arXiv, 2018.
livescience.com – The ocean is the hottest it's ever been, and no, this is not normal.
Source: Laure Zanna, Samar Khatiwala, Jonathan M. Gregory, Jonathan Ison, Patrick Heimbach. Global reconstruction of historical ocean heat storage and transport. Proceedings of the National Academy of Sciences, 2019.