A new study from Pew Internet found that between April 2009 and May 2010, social networking site usage grew 88% among Internet users aged 55-64, and the 65 and older group’s social networking presence grew 100% in the same time frame. Young people... 

A massive array of shimmering advertisements for Foursquare has been erected in New York City’s Times Square. This picture just appeared on Flickr ; it’s pretty impressive. The ad towers over American Eagle’s Times Square retail store.... 

Around this time yesterday, Cheezburger Network CEO Ben Huh publicly offered on Twitter to buy Reddit from publishing company Condé Nast . Reddit Co-Founder Alexis Ohanian responded in a blog post this morning suggesting that all the relevant parties... 

A suburban house cat in Ireland boarded a train and ended up lost in the bustling city of Dublin, but she was returned to her owner thanks to Twitter . After train station staff discovered the cat named Lilou (not to be confused with the almost-iconic... 

If you’re crafty, you can now publish a tweet longer than 140 characters. It’s not a feature but rather a bug of course, so don’t expect it to be possible for much longer. We first read about the bug in the Twitter Development Talk... 

There are hundreds of great web comics out there, which means if you’re new to the format, diving in can be difficult. We’re narrowed the many options down to 15 sure-fire funnies that will give you a regular smile. In the tradition of the... 

This post is part of Mashable’s Spark of Genius series, which highlights a unique feature of startups. The series is made possible by Microsoft BizSpark. . If you would like to have your startup considered for inclusion, please see the details here... 

The 2010 Mashable U.S. Summer Tour came to a triumphant close Wednesday at the Crystal Ballroom of Chicago’s Hyatt Regency hotel. Hundreds of guests from all over the Midwest joined us in the Windy City to cut loose, have a few drinks and put the... 

Twitter might be exploring an addition to its Promoted Tweets advertising platform that would let users pay to get more exposure — and followers — for their Twitter accounts. Sources have told All Things Digital that the rumored product is... 

E-mail marketing service MailChimp is preparing to release a new version of its application that includes support for integrating Facebook “Like” buttons in e-mail campaigns. MailChimp v5.2 will be released early next week and include support...