This chapter discusses some of the scientific theories and experiments that might have bearing on free will. It also discusses things like quantum physics and whether it is deterministic and whether it allows for libertarian free will. Some neuroscientists have gone so far as to claim that neuroscience proves the absence of free will. The most famous neuroscience experiment to stir up debate concerning free will was conducted by Benjamin Libet in the 1980s. Notable philosopher Alfred Mele has responded in detail to these and other neuroscience experiments. The length of time between intention and movement was probably much closer to the length of time between the awareness of the urge and the movement in Libet's experiment. Mele also discusses certain fallacious arguments that have been made based on Libet's experiments.