Geochemistry, Mineralogy, Volcanology：
1. A Novel Approach Reveals Element Cycles in the Ocean
Dissolved thorium isotopes light the way to a more thorough understanding of how different elements enter marine environments-and how long they stay there.
https://eos.org/research-spotlights/a-novel-approach-reveals-element-cycles-in-the-ocean
Centennial Collection：
1. Podcast: Uncovering the Ozone Hole
In the latest episode of its special series, AGU's Third Pod from the Sun features scientists whose work found the source of a hole in the sky.
https://eos.org/articles/podcast-uncovering-the-ozone-hole
Climate Change：
1. Managing Uncertainties in Climate Engineering
Control theory and climate engineering meet in a new special issue of JGR: Atmospheres.
https://eos.org/editors-vox/managing-uncertainties-in-climate-engineering
Hazards & Disasters：
1. Ancient Faults Amplify Intraplate Earthquakes
A comparison of deformation rates from Canada's Saint Lawrence Valley offers compelling evidence that strain in the region is concentrated along ancient structures from previous tectonic cycles.
https://eos.org/research-spotlights/ancient-faults-amplify-intraplate-earthquakes
2."Eco-friendly" Flame Retardant May Have Eco-poor Breakdown
These flame retardants replaced earlier chemicals known to degrade into environmentally harmful by-products. The newer compounds may do the same thing.
https://eos.org/articles/eco-friendly-flame-retardant-may-have-eco-poor-breakdown
3. Unraveling the Origin of Slow Earthquakes
Different nucleation styles detected in five slow-slip events in the same area of Japan's Ryukyu subduction zone suggest the physical properties along this tectonic plate interface change over time.
https://eos.org/research-spotlights/unraveling-the-origin-of-slow-earthquakes
4. Next Olympics Marathon Course Has Dangerous "Hot Spots" for Spectators
Spectators' health may be jeopardized by high heat loads along the 2020 Olympics marathon course in Tokyo, a bicycle-mounted meteorological survey found.
https://eos.org/articles/next-olympics-marathon-course-has-dangerous-hot-spots-for-spectators
5. Exploring Uncertainty in Streamflow Estimates
A review of streamflow uncertainty estimation methods reveals that one method does not fit all situations and provides recommendations for how to improve streamflow estimates.
https://eos.org/research-spotlights/exploring-uncertainty-in-streamflow-estimates
Space & Planets：
1. Thermal Signature of Martian River Deposits Suggests Cementation
Are there indications of extended aqueous processes beyond the period of widespread fluvial activity on Mars?
https://eos.org/editor-highlights/thermal-signature-of-martian-river-deposits-suggests-cementation
2. A Meteor Struck the Moon During the Total Lunar Eclipse
Telescopes around the world detected an impact event on the lunar surface just before totality on Monday. Amateur and professional astronomers are starting to coordinate data.
https://eos.org/articles/a-meteor-struck-the-moon-during-the-total-lunar-eclipse
