East Liberty-based Duolingo is taking early childhood education to new heights. The world’s leading mobile learning platform ...

Pittsburgh's biggest homegrown app, Duolingo, is always looking to spread its language-learning mission. It's now applying ...

The Inner City (Icheri Sheher) has preserved much of its 12th-century defensive walls. The 12th-century Maiden Tower (Giz Galasy) is built over earlier structures dating from the 7th to 6th centuries ...