Earth & The Planet
How Earth’s Magnetic Field Reverses
Rocks record repeated changes in magnetic polarity, revealing a dynamic field generated by moving liquid metal deep inside Earth.
Sep 30, 2026 • 12 min readOUR LIVING PLANET
Geography
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How Do Sand Dunes Move?
Sand dunes migrate when wind transports grains up their windward slope and deposits them near the crest. Sand then avalanches down the steeper sheltered side. Repeating that cycle shifts the entire landform downwind even…
Oct 6, 2026 • 13 min readRead the discovery →LATEST
Latest discoveries
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Earth & The Planet
How Sinkholes Form Beneath Solid Ground
Sinkholes develop when soluble rock, underground voids and changing water conditions remove support from material near the surface.
Sep 30, 2026 • 12 min read
Earth & The Planet
How River Deltas Build Land—and Why They Sink
Deltas grow when rivers deposit sediment faster than waves, currents and sinking remove it, but dams, extraction and rising seas can upset that balance.
Sep 29, 2026 • 12 min read
Earth & The Planet
How Rivers Create Meanders, Cutoffs and Oxbow Lakes
Flow moves faster along the outside of a river bend and more slowly along the inside, encouraging erosion, deposition and gradual migration that can…
Sep 28, 2026 • 12 min read
Earth & The Planet
How River Deltas Build and Lose Land
Deltas grow where rivers deposit sediment faster than waves, tides and sinking remove it, making their coastlines records of both natural processes and human…
Sep 23, 2026 • 12 min read
Earth & The Planet
How Seismic Waves Reveal Earth’s Hidden Interior
Earthquakes send different kinds of waves through the planet, allowing researchers to map boundaries, materials and motion far below any drill.
Sep 19, 2026 • 12 min readWORTH KNOWING
Popular & evergreen
Earth & The Planet
How Seismic Waves Reveal Earth’s Hidden Interior
Earthquakes send different kinds of waves through the planet, allowing researchers to map boundaries, materials and motion far below any drill.
Sep 19, 2026 • 12 min read