At least 40 million Americans are experiencing poor air quality. Much of the United States is under an ominous, hazy sky on Tuesday as smoke spreads from the massive wildfires in the West. At least 40 ...
Over the past seven decades, thousands of sophisticated spacecraft have been launched on ambitious missions to look down on ...
Humans have looked for omens since the days when they wore loin cloths and watched shadows dance on cave walls from a crudely constructed fire. Ancient peoples believed celestial events like an ...