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download HD Season 4 Episode
- Season 4 Electricity: A Bright Idea!
- Season 4 Heredity: It's A Family Affair!
- Season 4 Gravity: It All Falls Into Place!
- Season 4 Viruses And Bacteria: Tiny But Tough
- Season 4 Plastic: A Toxic Friend?
- Season 4 Electromagnetic Waves: Do You Copy?
- Season 4 Energy: A Burning Question
- Season 4 Fluid Mechanics: A Source Of Inspiration
- Season 4 Quantum Physics: A Step Into Unknown
- Season 4 Chaos Theory: Small Causes, Great Effects
- Season 4 Algorithms: Following The Recipe!
- Season 4 Mathematics: How To Speak To Robots?
- Season 4 Plate Tectonics: Great Shakes
Points de Repères - Season 4 Episode 5
6.70 25 minutes 
