Dozens of volcanoes, several of which are still active, emerge throughout a 450km stretch along the Ecuadorean Andes.

BBC: Scaling the Ecuadorean Andes

Construction in that area has reduced the number of active train tracks from four to two over a seven-mile stretch there since March 2012.

WSJ: Rail Corridor Hit With Major Outage

Because many of them started being active when they were younger, adolescents and teenagers need to know how to stretch properly to prevent these types of injuries.

CNN: Gaga's injury related to 'being active'