Venus Is Pulling Itself Apart. Slowly. But Right Now.

Three of the biggest canyon systems in the solar system are still tearing open on a planet everyone assumed had gone geologically quiet, and new modeling suggests it's happening close enough to the present that "recently" and "right now" barely mean different things.

Researchers at ETH Zurich, publishing in Nature Geoscience, built 3D simulations of Venus's crust using real rock physics instead of the flattened, simplified models used before. The key insight came from watching what happens after a rift stops moving: active rifts build broad, raised edges called flanks, and once the stretching stops those flanks slowly sag under their own weight, since Venus has no rain or wind to erode them the way Earth's mountains erode. Within about 15 million years, a flank that started 70 miles wide can shrink to less than half that. That decay rate turns flank width into a rough clock for how recently a rift was active.

Running that clock against three of Venus's largest rift systems, Ganis, Dali and Devana Chasmata, the team found flanks too broad and too tall to be old scars. Dali's western wall drops roughly 3 miles from rim to floor. Ganis's flanks run about 100 miles across, and Devana's stretch past 110. All three read as young, and possibly still active, based on how the simulations behave over time.

The pace involved, an estimated 1 to 4 inches of spreading per year, puts these rifts in the same range as some of the fastest-moving rift zones on Earth, a rate nobody expected to find on a planet long assumed to be tectonically frozen. Researchers think rising plumes of hot material from deep within Venus's interior are what's pushing the crust apart.

None of this is a smoking gun. It's a model, built on a simplified crust with a single stretching direction, and the real planet is messier: overlapping plumes, crossing rift junctions, landslides, none of which the simulations account for. The honest version of the finding is that these rifts were active sometime within the last several tens of millions of years, which is recent by planetary standards but not the same as catching one moving in real time.

Confirmation, if it comes, will likely arrive with the next wave of Venus missions. Both NASA and the European Space Agency have orbiters planned for the coming decade, including ESA's EnVision, expected to launch in the early 2030s. The new modeling gives those missions a shortlist of places to look first.

Venus, it turns out, has been busy.

Read the full story at Earth.com, July 2026

Hot Take: Planetary scientists assumed Venus was geologically dead. Instead, it's being pulled apart like taffy at the fair.