Who Knew? is a collection of Cheddar's favorite explainers organized in episodes together by topic. This week, our host, Hana Ostapchuk, presents three stories on the evolution of the airline industry. You can also check out full episodes of Who Knew? weekdays at 11 a.m. wherever you stream Cheddar News.
00:00 Why American License Plates Are Such A Mess
08:42 Why American Gas Stations Are Turning Into Supermarkets
16:47 How Highway Noise Barriers Can Make Traffic Louder
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