Christylez Bacon's new album is Hip Hop Unplugged. Yacouba Tanou/Courtesy of the artist hide caption

SXSW Interactive Festival attendees crowd the Austin Convention Center at the 2013 event. The festival's typically sprawling range of topics this year took a turn toward online privacy and surveillance implications. Jack Plunkett/AP hide caption

Scientists have long sought a way to detect Alzheimer's before symptoms appear. iStockphoto hide caption

High school students whose friends posted photos of drinking and smoking were about 20 percent more likely to become drinkers or smokers themselves. iStockphoto hide caption

ReBOUND Residential in Florida has bought multiple properties like this one, a formerly bank-owned home in Sunrise, Fla., as investment properties. The houses are now bringing steady returns as rentals. Greg Allen/NPR hide caption

Martin Luther King Jr., shown here with Stokely Carmichael during a voter registration march in Mississippi in 1966, regarded the younger Carmichael as one of the civil rights movement's most promising leaders. Lynn Pelham/Time hide caption

A crowd of 1,300 talks guns, God and politics at a steak dinner and gun raffle at Lone Oak First Baptist Church in Paducah, Ky. Blake Farmer/WPLN hide caption

Parts of 221B Baker Street have a shrine-like quality and feature photos of Benedict Cumberbatch, the handsome British actor who plays Holmes on the BBC series Sherlock. Ninety-percent of the customers are women. Frank Langfitt/NPR hide caption