1) A discovery is recognizing something that already exists for the first time, such as Christopher Columbus discovering the Americas or Fibonacci sequences in nature. 2) An invention is creating something totally new through one's own ideas and development, such as Thomas Edison inventing the light bulb or the development of mathematical concepts. 3) Generalization is reaching a general conclusion through repeated reasoning or making something more widespread, such as the rule that all triangles have three angles or that all numbers except 0 raised to 0 is equal to 1.