Scientists have nailed the biomechanics of a centuries-long puzzle on how freshwater flatworms known as planarians reproduce. The asexual freshwater worms, notoriously difficult to study, tear themselves into two pieces that go on to form two new worms. Researchers are now able to predict where planarian fission occurs based on its anatomy as well as explain how the process happens using a relatively simple mechanical model.

Source: Mechanism of asexual reproduction in flatworms