With the innovative scientific and technical evidence now making their entry into our courtrooms, especially in election petitions and criminal cases, much of the difficulty encountered by courts when faced with such scientific evidence, lies not necessarily in the lack of understanding the underlying science, but in the task of choosing between competing scientific explanations tendered by individuals who seek to wear the mantle of experts. In Chapter 43, the development and evolving standards of admissibility of scientific evidence to guide the court in the said circumstance is examined.