Los Angeles CA (SPX) Sep 01, 2025 Rocky material buried deep within Mars has been traced to colossal impacts 4.5 billion years ago, according to new findings from NASA's retired InSight lander. The discovery points to lumps of mantle rock, some up to 2.5 miles (4 kilometers) wide, scattered beneath the surface. Scientists believe massive collisions melted large portions of early Mars into magma oceans while forcing fragmen
