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Tar Sands: A New Fuels Industry Takes Shape | Science
Tedium, tragedy and tar: The slowest drops in science - BBC News
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Following heroin's path from Mexico to the Midwest | The Washington Post
Getting through the “black tar phase” | Chemtips
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Tedium, tragedy and tar: The slowest drops in science - BBC News
Pitch Drop Time Lapse 3 years to date - YouTube
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Pitch tar drop finally falls! - YouTube
World's slowest-moving drop caught on camera at last | Nature
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Pitch drop experiment - Wikipedia
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1,797 Tar Substances Images, Stock Photos & Vectors | Shutterstock
Iz-zift! Locals remember a time when tar in the sea was their biggest summertime worry
