倒着骑的自行车（Smarter Every Day 133）

Destin of Smarter Every Day learns to ride a bicycle whose steering is reversed, taking about eight months, and compares it with how his young son learned much faster. It illustrates knowledge versus understanding and brain plasticity in adults versus children.

Why HN likes it: HN cites it widely in discussions of tacit knowledge, habit, unlearning and adult versus child learning.

“There is an absolutely fascinating video about plasticity of learning between adults and children that I'd highly recommend watching [1].”