What's the difference between sunburn and sun poisoning? What's the deadliest poison? A toxicologist responds.

Anne Chappelle is a board certified toxicologist with two decades of experience studying the chemicals that can kill people.In this video, Dr. Chappelle answers such pressing questions as "WTF is sun poisoning?" "How long does poison take to work?" and "If a poison expires, will it still be poisonous?" — Read the rest