id	author	title	date	pages	extension	mime	words	sentence	flesch	summary	cache	txt
concept-2687	McCarthy, William	Something to Crow About: Birds with Tools	2022	17	.pdf	application/pdf	5154	351	64	Tool use can be defined by “the use of an external object as a functional extension of a mouth or beak, hand or claw, which extends the physical influence of the animal in the attainment of an immediate goal (Goodall, 1970; Kamil & Jones, 1973). The evolution of tool use in Homo Sapiens reveals important aspects about the development of higher-order cognition.	cache/concept-2687.pdf	txt/concept-2687.txt