Pets are responsible for spreading an invasive flatworm species around the world, raising concerns about its impact on ...

Add Yahoo as a preferred source to see more of our stories on Google. Three dogs are fighting outdoor. Dogs scare each other in an aggressive behavior in garden outdoor.© Take Photo/Shutterstock.com ...

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 ...

Image caption: The parasitic flatworm Haplorchis pumilio produces non-reproductive soldiers (left) which have much larger mouths than their reproductively capable colony-mates (center). The soldiers ...

Three dogs are fighting outdoor. Dogs scare each other in an aggressive behavior in garden outdoor.© Take Photo/Shutterstock.com Invasive species are a threat to biodiversity, causing damage to local ...