Musician Tom Petty died of an accidental drug overdose, according to a statement from his wife and daughter that was posted online.Petty had been suffering from a fractured hip that got worse during his recent tour, along with emphysema and knee pain.
The group is instead endorsing a program called "Flag Football Under 14," launched by the Concussion Legacy Foundation. The program aims to educate parents and young players about chronic traumatic encephalopathy.
A stillbirth is the death of a fetus after 20 weeks of pregnancy. Worldwide, most stillbirths occur in low- and middle-income countries. But the United States has higher rates of stillbirth than many other high-income countries, the researchers said.
Trees cover an average of 20 percent of the area in the 10 mega-cities in the study and provide about $500 million a year in benefits such as saving energy and reducing pollution, according to the researchers.