Doppler intuited that a sound’s pitch could be altered by the relative velocity between the source and an observer-70 years later Hubble used the same principle and 42 data points to prove the universe was indeed expanding. Arguably, no other data set of 0.042 Kb has done more to change our understanding of the cosmos. Although modest in volume, it took Hubble several years to acquire these precious numbers.
Valenzuela, M., Bartres-Faz, D., Bullmore, E., Fjell, A., Maletic-Savetic, M., Martins, R., Solowij, N. & Yucel, M. (2013). More thinking about less data: A perspective from the 2nd Provence Summer Workshop. Molecular Psychiatry, 18 (5), 524-525.