This story is part of Planet or Plastic?—our multiyear effort to raise awareness about the global plastic waste crisis. Learn what you can do to reduce your own single-use plastics. Read this ...

The ocean never runs out of surprises, and this time, it decided to show off a red-eyed Medusa jellyfish gliding through a tidepool in San Diego. With its translucent body and fiery red center, it ...