Since 1500, over 320 terrestrial vertebrates have gone extinct and populations of remaining species have declined by 25 percent on average. Invertebrate animal life is also facing a crisis. Human activity is the main cause of this current extinction event, known as 'Anthropocene defaunation'. Between 16 to 33 percent of vertebrate species are threatened or endangered globally, with large animals like elephants and polar bears being the most affected. The increase in rodents due to human activity is also leading to higher levels of disease-carrying ectoparasites. In the past 35 years, the human population has doubled while the number of invertebrate animals has decreased by 45 percent, mainly due to habitat loss and climate disruption. These losses could have far-reaching consequences in our daily lives. Dirzo recommended that promptly decreasing rates of habitat change and overexploitation could be beneficial, but these strategies should be customized to specific regions and circumstances. He emphasized that extinction is not just about losing a species, but also about the depletion of crucial ecosystem functions that animals contribute to. This information was shared in a review published in the journal Science.