Monte Carlo calculation methods are algorithms for solving various kinds of computational problems by using (pseudo) random numbers. Developed in the 1940s during the Manhattan Project, the Monte Carlo method signified a radical change in how scientists solved problems. Learn about the ways these methods are used in DOE’s research endeavors today in “Monte Carlo Methods” by Dr. William Watson, Physicist, OSTI staff. The Science Showcase is now featured on the OSTI Homepage monthly slideshow! Read and explore past Science Showcases.