Thoughts, in a brain, captured on video for the first time

Thoughts, in a brain, captured on video for the first time.

The two bright spots swimming around in the video below are both fluorescent paramecia — single-celled organisms, similar to amoeba. One has free range and swims rapidly about, while the other one is confined to the brain of a transparent zebrafish packed in gelatin hungrily measuring its dinner. Only the first paramecium is actually real — the second is pure muse, the ethereal scintillation of the first thought ever captured on video.