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In 4 million years, human life has undergone several major periods of transition -- each marked by physical remnants of change -- and today's physical evidence suggests that humans may be entering a new epoch marked by a "single, global political entity," according to a prominent archaeologist who will speak on the University of Colorado campus Saturday.

The University of Colorado at Boulder's College of Engineering and Applied Science has been a campus leader in creating new international offerings for students, including student exchanges, dual degrees, certificate programs and study abroad opportunities.

Ralph Ellison spent four decades writing but never finishing a novel to follow "Invisible Man," which was a meteoric success in 1952 and remains an American classic. Ellison's unfinished second novel goes on sale today, and a University of Colorado at Boulder associate professor is one of two editors who brought the legendary author's work to fruition.

Four University of Colorado at Boulder professors will receive $750,000 grants under the Department of Energy's new Early Career Research Program -- the most awards received by any university in the nation.

A new approach to social media called "Tweak the Tweet," conceived of by University of Colorado at Boulder graduate student Kate Starbird and being deployed by members of CU's Project EPIC research group and colleagues around the nation, is helping Haiti relief efforts by providing standardized syntax for Twitter communications.

Springtime ozone levels above western North America are rising primarily due to air flowing eastward from the Pacific Ocean, a trend that is largest when the air originates in Asia.

Howard Dean, former Democratic National Committee chairman, and Karl Rove, former senior adviser and deputy chief of staff to former President George W. Bush, will debate current events on Monday, Feb. 15, at 7:30 p.m. at the University of Colorado at Boulder's Macky Auditorium.

Five University of Colorado at Boulder faculty members and students were honored with prestigious research awards from the American Institute of Aeronautics and Astronautics at the organization's 2010 meeting held this month in Orlando.

The death toll in the massive 7.0 magnitude earthquake in Haiti Jan. 12 is expected to continue to rise in the coming days, likely in large part because of corruption and resulting shoddy construction practices in the poor Caribbean nation, according to a University of Colorado at Boulder seismologist.

** Richard Collins, a professor of law at the University of Colorado at Boulder Law School and the director of the Byron R. White Center for the Study of American Constitutional Law, can talk about legal issues connected with two proposed bills to regulate medical marijuana dispensaries in Colorado.