Can the Brain Become More Flexible?

Neuroplasticity is the most over-claimed word in popular neuroscience. A 2026 scoping review of adult language learning is a good place to see what the evidence actually supports — including where it becomes unclear.

Why Some People Become Exhausted From Simply Concentrating

An afternoon of concentration can leave someone as flattened as a long walk. A meta-analysis of 46 studies covering 2,603 people found a consistent brain network associated with fatigue — and was candid about its own limitations.

Could Your Brain Be Tired of Making Decisions?

By six o’clock the small choices feel disproportionately hard. There is a large research literature on that experience — and a serious dispute about whether the mechanism everyone cites actually exists.

Why PTSD Isn’t Only About Memory

The popular account is flashbacks and intrusive memories. A 2026 proposal argues for measuring something wider — and a 2026 study found the most informative signal was not a memory at all.