May Day in Costa Rica brought together protesters from public workers unions and a wide variety of other groups, including students, sex workers and indigenous people.
A small group of demonstrators hurled rocks at the Legislative Assembly building, police officers and members of the national media. At least 20 people were arrested.
Scientists have discovered S301, a star traveling at 8% of the speed of light around the black hole at the center of the Milky Way. Its orbit could help test Einstein’s theory of relativity and reveal how quickly Sagittarius A* rotates.
Unfortunately, the break in the rain won't last. Costa Rica's National Meteorological Institute expects instability to build over the weekend, and Saturday is shaping...
