Brains recognize a smell based on which cells fire, in what order – the same way you recognize a song based on its pattern of notes. How much can you change the 'tune' and still know the smell?
Mmmmmmm. That smells delicious. Wait, how do you know that?
The FDA has banned flavored e-cigarettes that appeal to kids. But new research shows that the danger of flavors could go beyond their appeal to kids. The flavorings themselves could cause damage.