drop of tar experiment

IMAGES

1. Pitch Drop Experiment: The World’s Longest Running Lab Experiment

   

2. The longest-running scientific experiment in the world involves a funnel full of tar pitch that

   

3. A blob of tar, also known as pitch, has finally dropped for the ninth time in a long-running

   

4. And here it is dropping, finally.

   

5. World's longest experiment drops 13-year blob

   

6. World's Longest Experiment 85 Years of Dripping Pitch Tar