Chemical compositions of rocks from Mars indicate that the earliest orbits of Jupiter and Saturn were more circular than they are today.
Mara Johnson-Groh
Mara Johnson-Groh started freelancing for Eos in 2019. She received her master’s in astronomy from the University of Victoria in 2016 and started working as a science writer at NASA Goddard Space Flight Center thereafter. In the years since, she’s worked additionally as a freelance writer and photographer covering everything under the Sun, and even things beyond it, for a variety of publications including Scientific American, Discover, Live Science, Astronomy, AIP’s Scilights, Muse, and Hakai, among others.
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Ancient Eruption May Change Our Understanding of Modern Volcanoes
Bubbles trapped in magma from a 1,000-year-old event reveal how scoria cones might erupt and what impact they may have on the landscape and atmosphere.
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Canada’s Rocky Mountain Forests Are on the Move
Using century-old surveying photos, scientists have mapped 100 years of change in the Canadian Rockies to document the climate-altered landscape.
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Below the Great Pacific Garbage Patch: More Garbage
New research is finding there’s more to marine debris than just what appears near the ocean surface, including tons of microplastics extending hundreds of meters into the deep.
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Are Cosmic Rays a Key to Forecasting Volcanic Eruptions?
A combination of relativistic particles and artificial intelligence may provide a new way to forecast when a volcano could erupt.
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Ancient Assyrian Aurorae Help Astronomers Understand Solar Activity
Records of aurorae in Mesopotamia from 2,600 years ago are helping astronomers understand and predict solar activity today.
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Looking for Prehistoric Pollen? Check the Floodplains
A new methodology calculates the soil properties most likely to preserve pollen.
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Jupiter’s Galilean Moons May Have Formed Slowly
A new model is the first to simultaneously explain many of the moons’ characteristics, including their mass, orbits, and icy composition
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Damselfish in Distress?
Noise pollution may be changing how some species of fish develop.
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Ancient River Discovery Confirms Mediterranean Nearly Dried Up in the Miocene
Sedimentary deposits reveal a Nile-sized river system flowing from what are today Turkey and Syria.