The resilient resists shocks and stays the same; the antifragile gets better".[1] The phenomenon is well studied in medicine, where for example Wolff's law describes how bones grow stronger due to external load. Hormesis is an example of mild antifragility, where the stressor is a poisonous substance and the antifragile becomes better overall from a small dose of the stressor. This is different from robustness or resilience in that the antifragile system improves with, not withstands, stressors, where the stressors are neither too large or small.