World

Pitch-Drop Worse Than Watching Paint Dry

NPR | July 19, 2013 4:39 a.m. | Updated: July 19, 2013 9:01 a.m.

Researchers at Trinity College Dublin have some long awaited test results: After 69 years, they have captured on video a drop of pitch, also known as bitumen or asphalt. The experiment proves pitch is a liquid.

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