sad Keanu websites, but how much attention are we really giving each link? According to a recent study by URL shortener Bit.ly, a standard link is clicked for an average of three hours until traffic subsides by 50 percent, eventually fading away into oblivion. If we're talking about a super timely news story like an earthquake hitting the east coast, well, its half-life was a paltry five minutes. When URLs are shared on social networks, they last around 3.2 hours on Facebook and 2.8 hours on Twitter, but those on YouTube persist more than twice that long. There, link half-life is 7.4 hours -- probably because it's home to phenom bomb memes like the one found after the break.