Blue mysterious and growing by the millions: alien-looking creatures blanket US beaches.

Masses of ephemeral organisms called “sea-men” wash up on the West Coast every year in the form of a “blue tide,” but warmer seas are increasing their numbers. From Oregon to California, blankets of blue, alien-looking creatures are washing up on rocky beaches. They are Velella velella, colonies of organisms with a hat-like body and … Read more