Scientists have helped solve a longstanding mystery about how Earth remained habitable after oxygen first accumulated in its atmosphere more than 2 billion years ago.

A nearby star system with two suns could potentially support an Earth-sized planet in a region where liquid water could exist, according to a new paper examining the dynamics of the system.

UC Riverside has opened a major new instructional building, expanding classroom, lab, and studio space for science and the performing arts. The four-story, 100,700-square-foot Undergraduate Teaching and Learning Facility, or UTLF, was completed over the summer and held its first classes with the start of the fall quarter on Sept...