A native of Portugal, she was most recently a correspondent for the National Geographic Channel. She is also is a former correspondent for the documentary series “Vanguard,” which aired on Current TV.
Her documentary on prescription drug abuse and pill trafficking, “The OxyContin Express,” was honored with a 2009 Peabody Award.
Mariana began her career in Portugal as a producer and correspondent for SIC Televisão. Her work has also appeared on PBS, CNN, CBS, Channel 4 (UK), and the CBC.