Geology has long been a field rooted in exploration and discovery. Traditionally, geologists spent long hours outdoors, mapping landscapes by hand and studying rock formations up close. These hands-on ...

If you use Excel 40 hours a week (and those are the weeks you are on vacation), welcome to the MrExcel channel. Home to 2,400 free Excel tutorials. Bill "MrExcel" Jelen is the author of 67 books about ...