Obsolete Certainty

RIO DE JANEIRO (AP) — Two brothers in Rio are living over the edge – literally: sleeping, working and eating on the side of a building 33 feet (10 meters) up in the air. Twenty-seven-year-old Tiago Primo and his 20-year-old brother Gabriel spend 12 hours a day in the bed, hammock, chair and dining table they’ve attached to a bright red-and-yellow wall as part of an art exhibit in Rio’s old center….