![](https://image.tmdb.org/t/p/original/k14i5k5VfBF0M5vbw4nXyabJ4Xj.jpg)
![](https://image.tmdb.org/t/p/w342/o1YPXxDcYL7amooRnSFSadNbbur.jpg)
Pocket Time Machine
How does the cellphone in your pocket link to the Big Bang, the evolution of human memory, and even the Titanic disaster? Big History reveals how cosmic forces conspired to give us the tool that has revolutionized the planet. From the dial pad to the way we write phone numbers, there's a hidden science behind the cellphone.
Stars:
![](https://image.tmdb.org/t/p/w300/k14i5k5VfBF0M5vbw4nXyabJ4Xj.jpg)
Other episodes for this season
![The Superpower of Salt](https://image.tmdb.org/t/p/w300/k14i5k5VfBF0M5vbw4nXyabJ4Xj.jpg)
![Horse Power Revolution](https://image.tmdb.org/t/p/w300/k14i5k5VfBF0M5vbw4nXyabJ4Xj.jpg)
![Gold Fever](https://image.tmdb.org/t/p/w300/k14i5k5VfBF0M5vbw4nXyabJ4Xj.jpg)
![Below Zero](https://image.tmdb.org/t/p/w300/k14i5k5VfBF0M5vbw4nXyabJ4Xj.jpg)
![Megastructures](https://image.tmdb.org/t/p/w300/k14i5k5VfBF0M5vbw4nXyabJ4Xj.jpg)
![Defeating Gravity](https://image.tmdb.org/t/p/w300/k14i5k5VfBF0M5vbw4nXyabJ4Xj.jpg)
![Brain Boost](https://image.tmdb.org/t/p/w300/k14i5k5VfBF0M5vbw4nXyabJ4Xj.jpg)
![World of Weapons](https://image.tmdb.org/t/p/w300/k14i5k5VfBF0M5vbw4nXyabJ4Xj.jpg)
![Mountain Machines](https://image.tmdb.org/t/p/w300/k14i5k5VfBF0M5vbw4nXyabJ4Xj.jpg)
![Pocket Time Machine](https://image.tmdb.org/t/p/w300/k14i5k5VfBF0M5vbw4nXyabJ4Xj.jpg)
![Decoded](https://image.tmdb.org/t/p/w300/k14i5k5VfBF0M5vbw4nXyabJ4Xj.jpg)
![Deadly Meteors](https://image.tmdb.org/t/p/w300/k14i5k5VfBF0M5vbw4nXyabJ4Xj.jpg)
![The Sun](https://image.tmdb.org/t/p/w300/k14i5k5VfBF0M5vbw4nXyabJ4Xj.jpg)
![Rise of the Carnivores](https://image.tmdb.org/t/p/w300/k14i5k5VfBF0M5vbw4nXyabJ4Xj.jpg)
![H₂O](https://image.tmdb.org/t/p/w300/k14i5k5VfBF0M5vbw4nXyabJ4Xj.jpg)
![Silver Supernova](https://image.tmdb.org/t/p/w300/k14i5k5VfBF0M5vbw4nXyabJ4Xj.jpg)
![The Big History of Everything](https://image.tmdb.org/t/p/w300/k14i5k5VfBF0M5vbw4nXyabJ4Xj.jpg)