Invasive hammerhead flatworms have been drawing attention for their toxic skin and their ability to respawn. But humans likely do not have to worry, experts say. Screengrab from NBC Chicago They have ...

New research finds a tiny freshwater parasite known to cause health problems in humans defends its colonies with a class of soldiers that cannot reproduce. The discovery vaults this species of ...

Planarians, flatworms known for their goofy cross-eyed gazes, may have to make an evolutionary trade-off between regeneration and sex – across different species of planarians, the same gene signalling ...