Personality tests like the MBTI are all over the internet, the workplace, and dating apps — but some say it’s all a bunch of baloney. So are any of these tests legit? And what can science actually tell us about personality? We talk to psychologists Dr. Alexander Swan, Dr. Emorie Beck, and Dr. Ted Schwaba.

Caffeine is a drug that tons of us take every day. But is that a bad thing? And if we get it in the form of energy drinks, is that super dangerous? We talk to Dr. Astrid Nehlig, Prof. Gregory Marcus, and Prof. Sachin Shah. 

Molly, ecstasy, MDMA: whatever you call it, this drug is blowing up. Some say MDMA can be a legitimate medicine to treat conditions like PTSD. But others reckon it's a dangerous drug that can fry your brain, and even kill you — from just one bad pill. Who's right? That's what we're snorting up today. We talk to psychiatrist George Greer, public health researcher Prof. Joseph Palamar, former DEA spe...