Some of the earliest animals on Earth stayed connected via networks of thread-like filaments that helped them to dominate the planet's oceans about half a billion years ago.
Scientists from the Universities of Cambridge and Oxford found the fossilized threads, which in some cases were as long as 12 feet, connecting strange organisms known as rangeomorphs.
These filament networks, which may have been used for food, communications or reproduction, were discovered in seven species across dozens of fossil sites in Canada, according to researchers.
The fern-like rangeomorphs were very successful during the Ediacaran period, about 571 and 541 million years ago. They have long fascinated scientists, in part because they do not seem to have had mouths, organs or a means of getting around.