Countries can emerge from collapsed empires or seceded territories. Early city-states like Ur and Rome were not considered modern countries. Modern countries are defined by their borders, governments, and capital cities
Created by Andy Frisella in 2019 as a mental toughness program. Inspired by James Lawrence's 50 Ironman race challenge. Not a fitness challenge but a transformative mental program
IVT states that continuous function f(x) takes values between f(a) and f(b). Theorem requires f(a) ≠ f(b) and function to be continuous. IVT proves existence of x-intercept and root of equations
House of Grimaldi has ruled Monaco since 1297. Prince Rainier III changed succession rules in 2002 to include siblings. Prince Albert II became monarch after Rainier's death in 2005
Past perfect continuous focuses on duration of ongoing actions before another past action. Contracts subject and first auxiliary verb in spoken form. Negative form uses 'not' after 'had'. Questions start with 'had' or use 'wh-' question words
Images can be two-dimensional (drawing, painting) or three-dimensional (sculpture). Images can be displayed through various media or reproduced mechanically. Volatile images exist briefly, fixed images are recorded on materials. Mental images exist in individual's minds as remembered or imagined concepts