There are multiple contenders when it comes to the question of who invented the traffic light. This episode looks at a few of the moments in traffic light history that got us to where we are today, as well as what made them a necessity in the first place.
San Francisco’s cable cars are the last working system of their kind. The reason they haven’t been completely replaced by more modern modes of transportation is largely the advocacy of a woman named Friedel Klussmann.
From hand fans to today’s high-end air conditioning technology, people have always found ways to deal with heat and humidity. And as mechanical cooling became more ubiquitous, some of the cultural practices for keeping cool were made obsolete.
When people say the Wright Brothers were first to fly, they're talking about a very particular set of circumstances. There are other contenders to the title of "first in flight," and each has their own compelling story and list of achievements.