When we wrote about that survey, which found that working adults care more about email than social media, we said that might be why grandparents are some of the most active on Facebook. Well, according to this new study that's also from Pew Research center, we got it right: more than half (56 percent, to be exact) of internet users aged 65 and above have signed up on the social network. What's even more impressive is that percentage apparently comprises 31 percent of all seniors in the US. If you're looking to get in touch with your selfie-loving teenage cousin, though, you may want to hit up Instagram instead. 53 percent of young adults between the ages 18 and 29 prefer the photo-sharing social network, which probably explains all those cringe-inducing reactions to Instagram's recent spam account crackdown.