Inside the Secret Life of Grease (S16, E2) | Modern Marvels | Full Episode

Transcript

NARRATOR: It makes the world go round and up and down and side to side. DANIEL LONGWELL: For us to recover aircraft, we have to have grease. NARRATOR: In our relentless battle to keep moving, grease, in all its forms, is the unsung hero. Without it, the countless wheels of our lives would grind to a halt. From aircraft carriers to canals, grease of... Read More