Learn whether smiling can actually make you feel happier and why it took John Harrison, a working-class clockmaker, to figure out longitude.

It Took a Working-Class Clockmaker to Figure Out Longitude by Ashley Hamer

• Dr Helen Klus. (2017, October 26). Latitude and Longitude. The Star Garden. http://www.thestargarden.co.uk/Longitude.html
• Longitude found - the story of Harrison’s Clocks. (2015, October 7). Royal Museums Greenwich. https://www.rmg.co.uk/discover/explore/longitude-found-john-harrison
• Roberts, A. (2014, May 17). A true sea shanty: the story behind the Longitude prize. The Guardian; The Guardian. https://www.theguardian.com/science/2014/may/18/true-sea-shanty-story-behind-longitude-prize-john-harrison

Can smiling really make you happier? By Grant Currin

• O’Grady, C. (2019, September 5). Can Smiling Really Make You Happier? FiveThirtyEight; FiveThirtyEight. https://fivethirtyeight.com/features/can-smiling-really-make-you-happier/
• Woodell, A. (2020). Leaning into the replication crisis: Why you should consider conducting replication research. Https://Www.APA.org. https://www.apa.org/ed/precollege/psn/2020/03/replication-crisis
• Strack, F., Martin, L. L., & Stepper, S. (1988). Inhibiting and facilitating conditions of the human smile: A nonobtrusive test of the facial feedback hypothesis. Journal of Personality and Social Psychology, 54(5), 768–777. https://doi.org/10.1037/0022-3514.54.5.768
• Wagenmakers, E.-J., Beek, T., Dijkhoff, L., Gronau, Q. F., Acosta, A., Adams, R. B., Albohn, D. N., Allard, E. S., Benning, S. D., Blouin-Hudon, E.-M., Bulnes, L. C., Caldwell, T. L., Calin-Jageman, R. J., Capaldi, C. A., Carfagno, N. S., Chasten, K. T., Cleeremans, A., Connell, L., DeCicco, J. M., … Zwaan, R. A. (2016). Registered Replication Report. Perspectives on Psychological Science, 11(6), 917–928. https://doi.org/10.1177/1745691616674458
• Coles, N. A., March, D. S., Marmolejo-Ramos, F., Arinze, N. C., Ndukaihe, I. L. G., Özdoğru, A. A., … Liuzza, M. (2019, February 4). A Multi-Lab Test of the Facial Feedback Hypothesis by The Many Smiles Collaboration. https://doi.org/10.31234/osf.io/cvpuw

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