Good morning. I'm David Greene. The Social Security Administration has put out its list of the most popular baby names from last year. Topping the list for girls: Sophia. For boys, it's Jacob. As for fast rising contenders, Aria is becoming popular for girls. It seems parents are inspired by "Game of Thrones." Boys names gaining popularity: Major, King and Messiah.
A few other names of interest: David is hanging on at number 19, and Steve, where is Steve? Oh, 762.
A study of genetically identical mice is providing some hints about humans. How can one identical twin be a wallflower while the other is the life of the party?
The study of 40 young mice found that their behavior grew increasingly different over three months, even though the mice shared the same genes and lived in the same five-level cage, researchers report Thursday in the journal Science.