Old age and an injury caused The Baylor Riding Association to retire the 25-year-old horse Sweetie months before her scheduled retiring date at the end of this semester.

The iconic west facade of the Alamo in downtown San Antonio is slowly eroding, a study by a team of Texas A&M-led architecture researchers using lasers and digital images shows.

A powerful explosion rocked a chemical plant and set it on fire Monday outside the separatist stronghold of Donetsk in eastern Ukraine, where fierce fighting has surged despite a renewed diplomatic push for peace.

It took 16 years of twists and turns. Over and over, Dr. Nancy Sullivan thought she was close to an Ebola vaccine, only to see the next experiment fail.

The federal government on Monday pledged $3.2 million to help save the monarch butterfly, the iconic orange-and-black butterfly that can migrate thousands of miles between the U.S. and Mexico each year. In recent years, the species has experienced a 90 percent decline in population, with the lowest recorded population occurring in 2013-2014.