This week marks the 50th anniversary of the Endangered Species Act, a landmark law that has helped protect thousands of species in the United States from extinction. Since its passage, the U.S. government has spent roughly $1.2 billion each year on endangered and threatened species, with tens of millions of dollars going towards widely known animals. However, the lack of resources for other species has been a major concern for conservationists, who are calling for increased funding and resources to ensure that all species are given the attention they need to survive.