As tau builds up in our brains, non-REM brain waves necessary for memory formation become erratic.

By Maya L. Kapoor

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September 11, 2026

You’re hurrying out of the grocery story to drive home and start cooking dinner. As the doors close behind you, you step into the parking lot and head… where? Where, among the rows of gleaming vehicles, did you park your car? The memory seems to have disappeared.