A newly discovered impact crater below the seafloor hints at the possibility that more than one asteroid hit Earth during the time when dinosaurs went extinct. UArizona researcher Veronica Bray, who specializes in craters found throughout the solar system, is co-author of a new study about the discovery.

Nature is full of patterns. Among them are tiling patterns, like what you see on a giraffe's coat. But what makes these natural patterns form? A new UArizona study uses bacteria to help answer that question.

University of Arizona students and faculty members completed a comprehensive study to track and characterize satellites, using a ground-based sensor they developed to measure satellites' brightness, speed and paths through the sky.