There are more than 100 known causes of obesity, Stanford stresses, so while genetics plays a large role, every body shape ...

NARRATOR: Hello! This song is all about different types of flat shapes. We see an image of a farm, and then shapes appear above it as the narrator mentions them. NARRATOR: If you look carefully ...

While initially very similar looking, these triangles behave very differently under dragging. "What kinds of shapes do you see on the screen?" "Are there any differences?" (typical responses: colour, ...