By suddenly and unexpectedly jumping into Florida’s Republican U.S. Senate primary, Connie Mack has at least made a lackadaisical race more exciting. To read a profile of the former senator, click here.

Five of the more than 500 dolphins that have washed ashore dead along the gulf coast from Florida to Texas over the past two years died from a bacterial infection called Brucella, federal scientists announced Thursday. And last year's Deepwater Horizon oil spill may have played a role, they said. Click here for the full report from NOAA.