location, surroundings, and how it appeared.
The most important thing is not to assume what you’re looking at based on color alone.
Take a picture, examine the surrounding area without disturbing the material, and look for clues such as moisture, cracks, insects, or construction openings.
Sometimes the strangest things hiding in our homes aren’t mysterious at all—they’re simply ordinary materials or natural processes that happen to appear in an unusually strange way.
