This week Reactions takes a close up look at the science of how we can see an atom. Since ancient Greek times, philosophers and scientists have tried to figure out what an atom looks like. For a couple thousand years, humans could only speculate on the structure and other properties of the smallest unit of matter. It wasn't until the 1980s that chemists could see individual atoms. Bestselling author Sam Kean takes us through the nearly 2,400-year quest to see the atom in a new episode of our "Legends of Chemistry" series.

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Credits:
Animation: Easy Explain Video
Music: Accounts via AudioMicro.com
Writer/Host: Sam Kean
Scientific/historical consultants:
Darcy Gentleman, Ph.D.
Chemical Heritage Foundation
Lead Writer: Noel Waghorn
Executive Producer: Adam Dylewski