The exact number of animal species that have gone extinct in the last century is difficult to determine. The IUCN reports 801 species known to have gone extinct since 1500, but this figure does not account for potential losses in the last hundred years alone, which could be higher due to increasing pressures on biodiversity and extreme rates of habitat loss [6]. 

Recent studies indicate that since 1970, vertebrate populations have declined by an average of 68%, signifying a substantial loss of species and raising concerns about ongoing extinctions driven primarily by human activity [2][4].

How many species of animals have gone extinct in the last century?

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