The Sahara Desert is green and vegetated every 21,000 years. A climate model shows why.
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Articles on Earth's axis
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Scientists have uncovered the long-term history of our receding moon. And it’s not from studying the moon itself, but from reading signals in ancient layers of rock on Earth.
The length of a day has critical impacts on our technologies, navigation, and more.
The Earth is constantly changing in natural ways, but most of those changes are very slow. Humans are speeding up other changes with global warming.
On the March equinox, everywhere in the world has more sunlight than darkness.
Astronomy and astrology do not agree on the dates of the zodiac constellations.
Recently, magnetic compasses at Greenwich pointed directly at true north for the first time in 360 years. This is currently happening in Western Australia too. But what does it mean?
The tilt of Earth’s axis as it orbits the sun results in the seasonal changes.
Top contributors
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Director of the ARC Australian Centre for Excellence in Antarctic Science, University of Tasmania
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Senior Lecturer, School of Geography, Planning, and Spatial Sciences, University of Tasmania
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Professor of Astronomy, UMass Amherst
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Professeur , Sciences de la Terre et de l'atmosphère, Université du Québec à Montréal (UQAM)
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Postdoctoral Research Associate, Department of Geoscience, University of Wisconsin-Madison
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Senior Research Geophysicist, CSIRO
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Professor Emeritus of Astronomy, University of Illinois at Urbana-Champaign
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PhD Candidate in Space History, UCL
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Distinguished Professor Emeritus of Anthropology, Binghamton University, State University of New York
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Professor Emeritus, Department of Geological Sciences, Binghamton University, State University of New York
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Postdoctoral research fellow, University of Helsinki
