The Colombian city of Cartagena began replacing its iconic horse buggies with electric carriages Tuesday, following years of protests by animal rights activists, who argued that horses pulling 19th-century-like coaches for tourists suffered from exploitation and poor health. In a sunny plaza lined with elegant colonial era mansions, Mayor Domek Turbay introduced a new fleet of 30 vehicles with large wheels and open tops that resemble the city’s traditional horse carriages. Cartagena is one of

The direction, distance and motion of the comet through the sky during its closest approach could have made it seem like it was hovering over Bethlehem when Jesus was said to have been born.

Don't miss the moon cozy up to Saturn on Dec. 26.