These lecture notes are woven around the subject of Burgers'
turbulence/KPZ model of interface growth, a study of the nonlinear
parabolic equation with random initial data. The analysis is conducted
mostly in the space-time domain, with less attention paid to the
frequency-domain picture. However, the bibliography contains a more
complete information about other directions in the field which over the
last decade enjoyed a vigorous expansion. The notes are addressed to a
diverse audience, including mathematicians, statisticians, physicists,
fluid dynamicists and engineers, and contain both rigorous and heuristic
arguments. Because of the multidisciplinary audience, the notes also
include a concise exposition of some classical topics in probability
theory, such as Brownian motion, Wiener polynomial chaos, etc.