Use the timeline below to select up to 20 seconds to watch or share.
3.64sTo preserve the heads, we use a rare form of powdered crystalline opal.
0.96s
0.7s
2.4sThis is the world's entire supply.
3.02sYet it's so powerful, it should last a thousand years.
2.87sIt keeps the heads alive, but we don't know how.
1.93sWhy did it give us those hallucinations?
1.9sBecause it didn't!
1.3sYeah-uh.
2.55sOpal has unusual temporal properties.
3.13sIt preserves each head in a time stasis bubble.
6.41sErgo, licking those heads actually sent us back in time to their original eras. Look!
0.83s
2.15sSchlock and more schlock.
2.05sPsst. Is the coast clear?
2.34sButton your yap, you mug.
3.09sI've discovered a new means of time travel.
3.24sI'll call it the Farnsworth Effect!
7.79sNice try, but even this discovery won't undo the treachery wrought by your nefarious ancestor, David Farnsworth.
3.02sIt will if we go back in time and stop him!