S3E9
Cosmos Season 3 Episode 9
⚠ Spoiler alert This recap gives away what happens in this episode.
Episode Summary & Review
In the counterintuitive realm of quantum mechanics, light can be two contradictory things (a wave and a particle), and somehow — no one knows how — an unseen observer can alter the nature of reality. Meet Thomas Young, the man who stumbled upon this hole in reality and the still-unfolding technological revolution it made possible.