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WASHINGTON —Scientists have taken a major step toward accurately determining the amount of energy that the sun provides to Earth, and how variations in that energy may contribute to climate change.

Adults who take one of the world's most commonly prescribed sleep medications are significantly more at risk for nighttime falls and potential injury, according to a new study by the University of Colorado at Boulder.

A new assessment of global earthquake fatalities over the past three decades indicates that 83 percent of all deaths caused by the collapse of buildings during earthquakes occurred in countries considered to be unusually corrupt.

Two University of Colorado at Boulder faculty members have been elected 2010 fellows of the prestigious American Association for the Advancement of Science.

Former University of Colorado football player Michael Sipili turned himself in to Boulder Police today in connection with allegations of sexual assault.

Words convey meaning, but our choice of specific words also conveys details about our personalities, new research confirms. For example, extraverts are likely to use the word "mouth" frequently, and "open" personalities are likely to use words like "folk," "poetry" and "universe."

When their romantic partners are not quintessentially masculine, women in their fertile phase are more likely to fantasize about masculine-looking men than are women paired with George Clooney types.

Colorado business leaders' confidence bounced back to pre-recession levels going into the first quarter of 2011, according to the most recent quarterly Leeds Business Confidence Index, or LBCI, released today by the °µÍø½ûÇø's Leeds School of Business.

In the first-ever quantification of energy expended by humans during sleep, a University of Colorado team has found that the metabolic cost of an adult missing one night of sleep is the equivalent of walking slightly less than two miles.

The University of Colorado at Boulder will open on a delayed start today, Dec. 31, at 10 a.m.