According to the World Wide Fund for Nature's 2015 Living Blue Planet report, since 1970, Earth has lost a whopping 49 percent of global marine animal species. For their investigation, researchers tracked 5,829 populations of 1,234 mammal, bird, reptile and fish species, making this study twice as large as a previous one published by the WWF in 2014. That study found that Earth?s population of wild animals had dropped by 52 percent since 1970. Read More?at ?www.motherboard.vice.com