| Name | First Aired | Runtime | Image | |
|---|---|---|---|---|
| S04E01 | Why Do We Dye Easter Eggs? |
YouTube
|
1 | |
| S04E02 | Why Do We Feel Emotions In Our Stomachs? |
YouTube
|
1 | |
| S04E03 | Why Do We Get Allergies? |
YouTube
|
1 | |
| S04E04 | Are Hong Kong And Macau Countries? |
YouTube
|
1 | |
| S04E05 | What Does Sound Look Like? |
YouTube
|
1 | |
| S04E06 | Why Do Cats Knead? |
YouTube
|
1 | |
| S04E07 | Who Invented The Internet And Why? |
YouTube
|
1 | |
| S04E08 | Are Pessimistic Brains Different? |
YouTube
|
1 | |
| S04E09 | Why Is Ketchup So Hard To Pour? |
YouTube
|
1 | |
| S04E10 | Why Do You Get The Spins When You're Drunk? |
YouTube
|
1 |
No artwork of this type.
No artwork of this type.
No artwork of this type.