Blackworms (Lumbriculus variegatus) are distant relatives of rainworms, measuring up to 10 cm long. They live in shallow marshes, ponds, and swamps in Europe and North America, where they feed on microorganisms and debris. To protect themselves from drought, blackworms can aggregate as entangled, shape-shifting "blobs" composed of a few to hundreds of individuals. Just like swarms of bees, rafts of fire ants, or flocks of starlings, blackworm blobs can show "intelligent" collective movement.
from General Physics News - Science News, Physics News, Physics, Material Sciences, Science https://ift.tt/3FAaDTj
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