Algal blooms have hit the site, between the Lincoln Memorial and the Washington Monument, after a $14.2 million repair ...

The "American flag blue" finish has turned into something else entirely, but why has algae reappeared?

Discover why some stars shine blue, white, orange or red and what those colors tell us about the cosmos.

A prolonged drought means the nation’s largest reservoirs are dwindling, and litigation over access to water could lie ahead. By Scott Dance The ruling accused the Trump administration of engaging in ...