The total population of people who are alive on Earth hasn't even hit 8 billion. At the same time, there are 10 quadrillion (10,000,000,000,000,000) individual ants crawling around at any given time. According to wildlife presenter Chris Packham, who appeared on the BBC, when combined, all of those ants would weigh about the same as all of us humans.
However, Francis Ratnieks, professor of apiculture at the University of Suss3x, disagrees. He says that while this fact may have been true in the past, these days "we must also remember that humans are getting fatter all the time. We're not just increasing in population, we're increasing in fatness, so I think we've left the ants behind."