Mining is finite and explorers are vital to guarantee that aging projects will be replaced by new veins and deposits. But knowing where to drill is like finding the proverbial needle in a haystack. To increase the chances of discovery, geologists and prospectors are ever on the hunt for the best technologies, strategies and tools used in modern mining. In this chapter, they discuss how to increase chances of a discovery to feed the industry’s appetite for new projects while exploring the challenges that still must be overcome.