The global drug discovery market is estimated to be worth at least $35 billion, a figure that could rise to $71 billion by 2025. But taking a drug from research and development to market is a long and resource-intensive process. A large part of this work involves rigorous testing to ensure a drug is not only effective, but safe -- and this unfortunately entails animal testing, whether on monkeys, rats, mice, dogs, or rabbits. Contrary to what some may think, animal testing is not only a pivotal facet of drug development, in most countries it's actually a legal requirement that must be completed before clinical trials on humans can commence. However, animal testing is slow and expensive, with a low success rate -- it's estimated that fewer than 10% of drug candidates tested on animals make it through the pipeline.