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# Mars' Childhood Didn't Go According to Plan
- URL: https://www.gottabekidding.me/mars-childhood-didnt-go-according-to-plan/
- Published: 2026-09-01T10:01:14.000Z
- Updated: 2026-09-01T10:01:13.000Z
- Description: A four-billion-year-old rock sat in the Sahara until 2022, then rewrote the early history of a neighboring planet. How does a world with no tectonic plates end up growing granite?
- Author: Signal
- Tags: Astronomy

A rock found by prospectors in the Sahara in 2022 turns out to be the oldest piece of Mars ever recovered on Earth. Teghaza 001 was pulled from the desert in September 2022 and has since been dated to more than 4.1 billion years old, meaning it formed when Mars was barely out of its cradle. What the rock preserved inside is the problem.

The meteorite hints that Mars was already losing its water at that early stage. It also points to a granite-like crust on ancient Mars. That's surprising, because granite formation on Earth is tied to tectonic activity, and Mars has no plate tectonics. Most of Mars is solid basalt. Granite has no business being there. And yet.

The rock may actually be even older than 4.1 billion years. When mineral grains melt or are exposed to fluids, their clocks reset to zero, so that date is a floor, not a ceiling. NASA JPL geochemist Lee Saper described the find as one that could reshape how scientists understand early Mars.

The meteorite also preserves clues about past water. It suggests Mars had more of it early on, but was already shedding it. Evidence comes from hydrogen ratios locked in the rock, which researchers use to reconstruct changes in a planet's atmosphere over time. Mars lost its magnetic field, its atmosphere thinned, and the water followed. All of that, apparently, started almost immediately.

How Mars grew granite without tectonic plates is something scientists are still puzzling over.

**Read the full story at** [EarthSky, July 24, 2026](https://earthsky.org/space/mars-meteorite-teghaza-001-granite-water/?ref=gottabekidding.me)

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**Hot Take:** The universe built Mars the way a dad assembles a bike: ignore the instructions, improvise wildly, and quietly dispose of the leftover parts. Somehow it worked.