Tech WondersPlay

Zone 22

Silicon Dunes

Nine lessons of about three minutes each, every one with a live demo and a quick test.

  • Mind-Bending Math & Games×2
  • Mind & Perception
  • Space, GPS & Maps
  • Inside the Computer
  • The Internet & Web
  • Security & Scams
  • Codes, Cryptography & Blockchain
  • Quantum & Relativity
Play this zone
  1. 190GeometryWhy Bubbles Are RoundA sphere holds the most air with the least skin
  2. 191Multisensory PerceptionThe McGurk EffectWhat you see changes what you hear
  3. 192LogicThe Hat PuzzleA team can coordinate perfectly without talking
  4. 193Space WeatherThe Northern LightsSolar wind paints the sky by exciting gases high above us
  5. 194ElectronicsThe TransistorA switch with no moving parts, and your phone has billions
  6. 195Web ArchitectureThe Web Is RottingHalf the links in US Supreme Court opinions no longer work
  7. 196Account RecoveryYour Mother's Maiden NameSecurity questions are often answered on your own social media
  8. 197Modular ArithmeticClock MathHuge numbers reveal their endings when you count like a clock
  9. 198ElectricityElectricity Is SlowElectrons crawl along a wire; the signal races