After examining it more closely, they noticed that the object seemed to contain tiny pieces of lint, hair, and other household material. They even wondered whether something could be living inside it. The discovery was unsettling because they had no idea how such an unusual structure had appeared in their apartment.
Instead of throwing it away, they photographed the object and searched online for answers. The identification was surprising: itwas a case-bearing moth larva, a tiny creature that creates a protective case around its body.