08/31/2026
👁️ A perfect 50km bullseye drawn in rock. 100 million years old. Visible from space. And scientists debated its origin for decades.
The Richat Structure in Mauritania — called the Eye of the Sahara — is a circular geological formation 50km in diameter, showing perfect concentric rings of rock formations.
Astronaut Ed White first photographed it from Gemini 4 in 1965 — it became a landmark used by astronauts for orientation because it's so visually distinctive from orbit.
Early theories: meteor impact crater. The symmetry seemed too perfect to be anything else.
Actual explanation after decades of study: a deeply eroded geological dome. Ancient rock layers were pushed upward in a dome shape by underground geological processes, then wind erosion carved away at different rock types at different rates — leaving the harder rocks as raised rings, the softer rocks as depressions. The circular rings are the edges of those geological layers, exposed by 100 million years of erosion.
No meteor. Just time. And patience. And different rocks eroding at different speeds.
A geological clock written in rock, readable from space, that took 100 million years to draw itself.Drop 👁️ if the Earth just became an artist. 👇
