Noah Zandan shows off his Zeo sleep-tracking headband. His other self-tracking devices are on his wrists. Noah and his father, Peter, are both part of the growing "Quantified Self" movement.
An image of late President Hugo Chavez hangs behind acting President Nicolas Maduro, as he speaks to supporters after registering his candidacy outside the national electoral council in Caracas, Venezuela, on Monday.
A Coca-Cola mural in Vicksburg, Miss., where the soda was first bottled in 1894. Mississippi's governor is expected to sign a bill that would prevent the regulation of soda portion sizes by counties or towns.