Following Darwin's footsteps: Evaluating the impact of an activity designed for elementary school students to link historically important evolution key concepts on their understanding of natural selection - Xana Sá-Pinto; Alexandre Pinto; Joana Ribeiro; Inês Sarmento; Patr{\'ı}cia Pessoa; Leonor R. Rodrigues; Luc{\'ı}a Vázquez-Ben; Evangelia Mavrikaki; Joaquim Bernardino Lopes (Ecology and Evolution, 2021)