Introduction & Journey Setup

• Universe contains hundreds of billions of galaxies with sextillions of stars/planets
• Earth positioned in middle with humans towering over microscopic worlds
• Journey begins in 1,000m park (15-minute walk)
• Each "click" reduces size by 1,000x factor
• Magic science suit prevents death during shrinking

Miniature Realm (2mm tall - grain of sand size)

• Standing on grass blade tall as 8-story building
• Square meter lawn = dense metropolitan area with 100,000 blades
• Park now size of France, requiring week+ to cross
• Humans loom 4x taller than Empire State Building
• Bee size of helicopter creates ground vibrations
• Air resistance increases 1,000x, feels like moving through honey
• Flying insects use air density advantage
  • Wings function as paddles rowing through air
  • Bee scaled to human size would outrun Concorde jet
  • But couldn't take off due to wing-to-weight ratio

Microscopic Realm (2 micrometers - E. coli bacteria size)

• Park now million kilometers wide
• 25 years walking non-stop to cross
• Bee becomes Mount Everest-sized, humming and vibrating
• Air viscosity equals lava at human scale
• Grass blade wide as Paris to regular human
• Surface shows valleys, deserts, craters from aphids
• Individual cells size of houses with glass-like exteriors
• Stomata openings suck air, blow out oxygen
• Water droplet asteroid-sized, moves at breathtaking speeds
• Water molecules act like social creatures creating cohesive force
• Microorganisms in water:
  • Viruses size of tennis balls
  • Euglena cells like freight trains
  • Bacteria like oily jellyfish with tentacle propellers
  • Move hundreds of body lengths/second (equivalent 600 km/hr human speed)
  • No inertia due to low weight, high viscosity creates jerky motion

Molecular Realm (2 nanometers - molecule size)

• Water droplet now moon-sized to regular human
• Grass blade reaches Alaska to Australia
• Park almost solar system size, filled with matter everywhere
• Water droplet contains nearly sextillion H2O molecules
• Water = storm of molecules smashing together
• Molecular collision rate: hundreds of trillions/second
• Molecular speed: 2,300 km/hour
• Heat = molecular motion, vibration, collision
• Temperature measures average molecular speed
• Air molecules separated by vacuum
• Average air molecule travels 60nm between collisions
• Room air compressed would fill only 0.1% of volume
• 99.9% of breathing space is vacuum

Subatomic Realm (under 2 picometers)

• Human would be 2 billion km tall (Sun to Saturn arm span)
• Atomic nucleus = grain of sand on fingertip
• Nucleus contains 99.97% of atom's mass
• Electron cloud sphere size of Eiffel Tower
• Electrons morph/shape-shift around nucleus
• Atomic nuclei: chaotic blurs that bulge, roll, quiver, breathe
• Nuclear energy prevents stillness
• Nuclei vibrate sextillions of times/second

Planck Scale (Quantum Foam)

• Planck length = distance light travels in Planck time
• Planck time = time for light to travel Planck length
• Universe models break down at smaller scales
• Particles bubble into existence, spontaneously disappear
• Creates quantum foam of unimaginable energy
• Unknown if smaller scales exist

Conclusion & Product Promotion

• Universe large/strange looking up, even larger/stranger looking down
• Perfect place = current human scale (not too big, not too small)
• Kurzgesagt shop promotion featuring immune system and evolution posters
• Products fund video creation