Mutation

Mutations Threaten To Undo Progress Made In Controlling COVID-19 Pandemic
The coronavirus is becoming more genetically diverse, and health officials say the high rate of new cases is the main reason.
By Marilynn Marchione, AP

Identical Twins Arent Perfect Clones, Research Shows
A new twin study shows that while twins are very alike, it is not a perfect similarity.
By Christina Larson, AP