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A baby has been born with the DNA of three parents. We hear about the promise the technique offers for avoiding some birth defects, and the ethical concerns it raises.  

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NFL players who had knee surgeries such as ACL reconstruction or patellar tendon repair experienced the most significant decline in performance, according to a new study. (Pixabay)

The Chicago Bears open the season Sunday with several players sidelined by injuries. A new study analyzing common orthopedic surgeries NFL players receive could shed some light onto when fans can expect them back.

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