Time Machine: The Throughline History Quiz : NPR
Time Machine: The Throughline History Quiz How much do you remember?
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Time Machine: The Throughline History Quiz

DJ Frankie Knuckles plays at the Def Mix 20th Anniversary Weekender at Turnmills nightclub on May 6, 2007 in London, England. Claire Greenway/Getty Images/Getty Images Europe hide caption

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Claire Greenway/Getty Images/Getty Images Europe

There's more plastic waste in the world than ever. So, where did the idea come from that individuals, rather than corporations, should keep the world litter-free? Tim Boyle/Getty Images hide caption

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Tim Boyle/Getty Images