A recent study from Johns Hopkins Medicine sheds light on a new animal study revealing that psychedelic drugs have a common ability to reopen “critical periods” within the brain. These critical periods refer to times when all mammals are more receptive to stimulus in the environment, which can have an impact on brain development. The researchers specifically found that psychedelics can actually increase the duration of this ‘critical period’ from 2 days up to four weeks by taking psychedelics just once.