Science Experiments in London...
- The arduous process that would-be London cabbies put themselves through in order to memorize "The Knowledge" makes actual, measurable physical changes in their brains.
- The Monument to the Great Fire of London is not only a 202'-tall column marking the spot where London's Great Fire began, it's also a giant fixed telescope intended to measure stellar parallax to confirm by experiment that Earth really orbited the sun. Unfortunately, it was built on one of the busiest thoroughfares in London and the vibration caused by passing traffic was enough to render the telescope unusable.