Yes, the brain does forget facts when you do not use or review them, and the underlying neural connections do become weaker over time. This follows the biological rule of "use it or lose it," where inactive synapses gradually weaken.How the Brain Forgets FactsSynaptic weakening: Connections between neurons, called synapses, lose their strength and efficiency when they are not repeatedly activated by thoughts or cues.Active forgetting: Recent studies show the brain uses specific biological processes—such as signaling molecules or cellular cleanup—to actively degrade unused memory traces.Retrieval failure: Over time, unreviewed facts become harder to bring to conscious awareness because the pathway to access them fades or gets buried by newer information.Why Reviewing HelpsSpacing effect: Reviewing facts at regular, increasing intervals signals the brain that the information is important, which rebuilds and stabilizes the physical connections.Long-term storage: Repeated recall moves memory traces into more stable parts of the brain, making them much more resistant to fading.If you'd like, I can share tips on how to set up a spaced repetition schedule to help you keep facts fresh with minimal effort. Because of this we must write.