Venus is more like Earth than we thought. Archive NASA data allows scientists to peer beneath the surface

Venus Is More Like Earth Than We Thought: Archived NASA Data Sheds New Light on Earth’s Twin Venus, often called Earth's twin due to its similar size, mass, and composition, has long been viewed as a cautionary tale of planetary evolution gone wrong. Its surface is a blistering 900 degrees Fahrenheit, its atmosphere thick with carbon dioxide and sulfuric acid clouds, and its landscape seemingly frozen in time. For years, scientists assumed Venus was geologically dead. But new insights from old data are rewriting that narrative—and bringing Venus closer to Earth than we ever thought. In a groundbreaking study, scientists have reanalyzed decades-old radar data from NASA’s Magellan spacecraft, which orbited Venus between 1990 and 1994. Originally, this mission mapped about 98% of Venus’s surface using synthetic aperture radar, offering an unprecedented look beneath its dense cloud cover. At the time, however, limited computing power and modeling tools meant that much of the data’s potential remained untapped. Fast forward to today, and those same datasets—when processed using modern techniques—are yielding stunning discoveries. The research team applied updated computer models and image processing algorithms to Magellan’s radar data, revealing unexpected features on the planet’s surface. Most notably, they identified large regions that appear to show tectonic deformation and possible signs of recent volcanic activity. These findings suggest Venus is not the geologically dormant world many believed it to be—but one that may still be reshaping itself from within. On Earth, plate tectonics play a crucial role in shaping continents, forming mountains, and triggering earthquakes. Until now, no solid evidence confirmed that similar processes occurred on Venus. But the Magellan data reveals “blocky” terrain on Venus that looks surprisingly like Earth’s mobile crust. In some areas, surface features seem to have moved horizontally, as though pieces of the crust are jostling against each other. "This is a major development," said Dr. Paul Byrne, one of the lead researchers. "We’re seeing surface features that imply Venus is not completely rigid but may have mobile sections—much like Earth’s lithosphere. That’s a significant change in how we view our planetary neighbor." In addition to tectonic activity, the study points to what may be ongoing volcanic processes. Several lava-like flows appear to be relatively young, showing fewer impact craters than older regions. This aligns with other recent studies suggesting Venus might still be volcanically active—another trait it shares with Earth. These revelations are more than just scientific curiosities. They hold important implications for our understanding of planetary evolution, climate change, and even the possibility of past habitability. Venus and Earth may have started with similar conditions, but their paths diverged dramatically. Understanding why Venus became a scorching greenhouse while Earth thrived could offer crucial insights into our own planet’s future. Moreover, this study is a powerful reminder of the enduring value of archival data. The Magellan mission ended over 30 years ago, yet its treasure trove of information continues to inform new science thanks to modern tools. “It’s like reading an old book with a new pair of glasses,” one researcher noted. The timing couldn’t be better. NASA is planning to return to Venus with two ambitious missions later this decade: VERITAS (Venus Emissivity, Radio Science, InSAR, Topography, and Spectroscopy) and DAVINCI (Deep Atmosphere Venus Investigation of Noble gases, Chemistry, and Imaging). These missions aim to map Venus’s surface in higher detail, study its atmosphere, and explore whether it once had oceans or could have supported life. As we prepare to revisit Earth’s sister planet, this new understanding reshapes Venus not as a static wasteland, but as a dynamic world—possibly still evolving. In the search for life beyond Earth and the quest to understand planetary environments, Venus is no longer just a warning. It may also be a mirror.