Speaking to 50,000 German youngsters, the pontiff suggested that kids today spend too much time on futile activities, such as the Internet and TV.
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The agency says in a statement that a report in an Italian magazine that it "has targeted" the Vatican is false.
The pope's Twitter handle is live again as Cardinal Jorge Mario Bergoglio steps up to lead the Catholic Church and sends his first tweet.
Last week, the Vatican announced that the pope's postings to Twitter would end upon his official retirement day. His tweets have been summarily removed.
If you need an indulgence for your sins, follow the pontiff at Catholic World Youth Day. But your click should come from the heart.
Questions for the pontiff range from earnest to rude and cover a wide spectrum of topics from faith to "The Cosby Show."
Even the ancient city of Jerusalem has been transformed by tech, as visitors to holy sites turn to mobile devices to reach out to God.
In northern California, the SETI Institute has to shut down its systems because of wildfires near its telescope array.
If you're between 13 and 18, you're apparently more enamored of Smosh than Jennifer Lawrence.