More precise quote from the Nature article: "... Yitang Zhang ... finds that there are infinitely many pairs of primes that are less than 70 million units apart

More precise quote from the Nature article: "... Yitang Zhang ... finds that there are infinitely many pairs of primes that are less than 70 million units apart without relying on unproven conjectures." I agree that there is a difference between "twin primes" and "pairs of primes".