Drug lord Joaquin "El Chapo" Guzman escaped from a maximum-security Mexican prison on through a 5,000-foot tunnel.

This article analyses the temperature environment of air source heat pump using the air in underground tunnel as cold and heat sources, then models tunnel heat transfer and numerically computes, ...

Loke reiterated Malaysia Airports’ explanation that this morning’s KLIA Aerotrain disruption was caused by a technical fault involving a drainage pump within the airport’s existing tunnel ...