What happened
Scientists tested whether common methods for tracing trait evolution work when species hybridize—and found they often give wrong answers. This matters because many real organisms do hybridize, so researchers studying evolution in these systems may be drawing incorrect conclusions about how traits actually change over time.
Why it matters
Evolutionary biology has relied on tree-based models for decades, but those models assume clean separation between species; when hybridization happens, the methods produce misleading estimates of evolutionary rates and trait origins, so findings from studies of hybrid-prone systems (crops, wild animals, fungi) may need re-examination.