Nine out of 10 researchers believe using animals is “essential” in studies, according to an online poll of nearly 980 biomedical scientists from across the globe conducted by Nature magazine. Of those who participated, 70.3 percent report using animals in experiments. The poll does note some mixed feelings about the issue, with a third of those who work on animals noting they have “ethical concerns” about the role of animals in research, and 16 percent reporting they have “misgivings” about some of their work.