False claims spread faster and further than true ones because they are newer and more surprising, and people — not bots — do the amplifying. That is the finding of the largest study of its kind: the 2018 MIT study published in the journal Science, which analyzed roughly 126,000 story cascades on Twitter and found false news was 70% more likely to be retweeted than true news, and reached 1,500 people about six times faster.
Buzz News 10 publishes verification explainers built on the documented record.
What did the study actually measure?
The MIT team, led by Soroush Vosoughi and colleagues, traced every contested story cascade on Twitter from 2006 to 2017 — about 126,000 cascades, verified against six independent fact-checking organizations. Falsehood won on every metric: depth, breadth, speed. The effect was strongest for false political news, and the gap held across the decade studied.
The finding that surprised even the researchers: bot accounts amplified true and false stories roughly equally. The speed advantage of falsehood came entirely from human retweets — the novelty hypothesis, since false claims are on average more novel than true ones and novelty earns sharing.
Why can't corrections catch up?
Structural reasons, documented across the misinformation literature. The correction reaches a different, smaller audience than the claim — the people who saw the original often never see the fix. The claim is usually simpler and more surprising; the correction carries the boring complexity. And each share of the original creates a new infection point while the single correction stays put.
Fact-checking desks know this arithmetic firsthand — AP Fact Check and Reuters Fact Check publish corrections to viral claims daily, and the desks' own published methodology notes that the checked claim has typically already completed its spread by the time a check runs.
Does this mean platforms and fact-checkers are useless?
No — it means the timing is the battle. The same literature shows corrections reduce belief in the checked claim among the people who see them; the reach gap, not the effectiveness gap, is the problem. That is why the professional method is checking early and labeling fast, the discipline fact-checking desks describe in their published guides.
For a reader, the practical takeaway is the mirror of the desks' method: the share button is the amplifier. A claim that is surprising, unsourced, and fresh is precisely the format the Science study found travels fastest — which makes the four-minute origin trace the cheapest correction there is.
For more context, read Reverse image search, explained: what it can actually prove.