Abstract: Urban populations are always on the increase, increasing the number of vehicles, leading to severe congestion, longer travel times, and substantial emergency vehicle response time delays.

Out in the Kuiper Belt, the massive doughnut of debris beyond Neptune, about one in 10 kilometer-scale objects have surprised scientists with their unexpected shape. Rather than resembling a ball, ...

Researchers have developed a solar cell system that uses mirrors to concentrate solar energy. In addition to electricity, it produces heat for a plant that will capture carbon from industrial ...

Planetary systems in the Milky Way galaxy tend to follow a particular pattern: rocky planets toward the center, closest to ...

A newly studied solar system breaks the usual planet pattern, raising fresh questions about how rocky and gas planets form.