After a Danish study tracked more than 5000 men for 44 years—from young adulthood to late midlife—data showed that those who had used cannabis in their early years showed slight uptick on cognitive function. At just a few points in IQ scores, there may be questions about the clinical significance of this difference; and researchers note that further studies are required to better understand whether these effects are temporary and disappear over a prolonged period…but asking whether Grandpa used to get high (or, might be interest in doing so now) might be good for at least a giggle…