Atomic clocks are now so accurate that Earth’s gravity can be seen to slow them down. Geodesy is preparing to use this relativistic effect to measure elevation.
Features
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Louise Kellogg: Geoscientist, Mentor, Science Communicator
The geoscientist, who studied Earth’s mantle and believed strongly in the power of mentoring, passed away in April.
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The Coming Surge of Rocket Emissions
With the space industry’s rapid growth, rocket exhaust will increasingly accumulate in the atmosphere. How this accumulation might affect the planet is unknown—because we’re not taking it seriously.
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Can NASA Get Its Satellite Data into the Real World?
This article has been removed due to inconsistencies regarding quotations and concepts.
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Resurrecting Interest in a “Dead” Planet
New research suggests that the surface of Venus is busy, but it may take new missions to our “sibling” planet to confirm this.
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Forgotten Legacies: Understanding Human Influences on Rivers
Logging, urbanization, and dam building are a few ways people have significantly altered natural river ecosystems. Understanding that influence is a grand challenge of our time.
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How Cassini Ran Rings Around Saturn and What It Helped Us Learn
Once and future rings: During its final 22 orbits, the Cassini spacecraft provided a completely new look at one of our solar system’s most famous features.
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Apollo’s Legacy: 50 Years of Lunar Geology
Samples of the Moon’s surface brought back by Apollo astronauts ushered in a new era of planetary science. Scientists today continue the legacy.
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Honoring Volcanologist David Johnston as a Hero and a Human
A new biography details the life and legacy of the scientist who died on Mount St. Helens.
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The Tides They Are a-Changing
The twice-daily ebb and flow of the sea have the power to change the planet. Weak tides could have allowed Earth to freeze over, and strong tides may have given vertebrates a leg up on land.