Episode 172. Topic: The fight for seat belts. Theme: Cars. When were seat belts invented and when were they finally in cars and actually mandated? Do seat belts make drivers safe or do they make us more confident?  

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Episode 171. Topic: The first cars. Theme: Cars. When were cars invented? What did early versions of cars use as fuel? When did they become popular? 

Episode 170. Topic: Babies and classical music. Theme: Music. What is the logic behind the parenting advice to have babies listen to classical music? Is this true and what is the science behind this claim? 

Episode 169. Topic: People who do not like music. Theme: Music. Why are some people indifferent to music? How many are like this? What is the psychology behind this? 

Episode 168. Topic: Why Mozart was great. Theme: Music. Who was Mozart and why has his music stood the test of time? 

Episode 167. Topic: Stradivarius. Theme: Music. What is a Stradivarius stringed instrument and why are they so expensive? Are they truly better in the eyes of science? 

Episode 166. Topic: Why Pomp and Circumstance. Theme: Music. Why is the song Pomp and Circumstance played at every US graduation? Do other countries have their own graduation song? 

Episode 165. Topic: Koalas and chlamydia. Theme: STDs.  Chlamydia infections in some wild koala populations can be as high as 100%. Should you be worried about catching chlamydia from just touching a koala? 

Episode 164. Topic: How HPV causes cancer. Theme: STDs. HPV is the most common STD and can cause cancer in both men and women. How does that work and can you protect yourself? 

Episode 163. Topic: Why we cannot cure herpes. Theme: STDs. Herpes is one of the most common viral STDs. If you catch it, you will have it for life as it is incurable. We can immunize and cure other viruses so why not herpes?