Normally, when doctors are trying to look at whether an individual is at risk of heart disease, they'll look at classic indicators of health. But according to study, they might be better off taking a look at their tweets.
Facebook's newly purchased imaging site appears to be doing very well for itself, with Instagram claiming to have 300 million active users. That's more than the 284m regular users Twitter claimed to have in its most recent stats briefing. [Instagram via Recode]