Ever walked from your kitchen to the living room to find your phone and then forgotten what you were looking for once you got there? Researchers think your brain is hard-wired to undergo precisely that process of forgetting.
We often think that if a drug has been studied by scientists and given a favorable outcome, then it must be safe and proven. But many kinds of biases can creep into a study, rendering it less than effective.
Although left-handed people were thought to be "sinister" or "unnatural" in previous eras, we now know that left-handedness is natural for 10 percent of the population. And it can have some advantages over right-handedness too.