Scientists says family ties shape the social lives of the aggressive predators.
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Scientists pieced together the genetic history of Acinetobacter baumannii — a notoriously stubborn hospital pathogen — using samples dating back 50 years to the 1970s.
The cave lion had a history of interbreeding with modern lions that was tightly linked to past climatic changes.
When people harness the logic of natural selection, they can often find efficient and effective ways to solve complex problems.