New Scientist, July 12, 2017: Chris Wolf and William Ripple at Oregon State University looked at historical accounts of large carnivores and maps of their preferred habitat around AD 1500, and found that they are now present in just a third of the land area they occupied back then. Of the 25 species analysed, all weighing more than 15 kilograms, 15 had lost more than half their range. Publication: Range contractions of the world’s large carnivores