Your brain is always a fraction of a second behind the present
Your brain processes sensory information with a slight delay, making it seem like it lives in the past. This delay, about 100 milliseconds, affects how you interact with the world. Additionally, your brain anticipates sensory input, which can lead to interesting phenomena like the inability to tickle yourself.
- ▪The brain's fastest neurons transmit data at about 431 km/h, much slower than copper wire.
- ▪Sensory information is processed with a delay of approximately 100 milliseconds.
- ▪The brain anticipates sensory consequences, which explains why we can't tickle ourselves.
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Record
| Original publisher | BBC Science Focus Magazine |
| Canonical URL | https://www.sciencefocus.com/the-human-body/brain-lives-past |
| Publication time | Sat, 16 May 2026 23:14:20 +0000 |
| Retrieval time | 2026-05-16T23:40:19.081Z |
| Last seen | 2026-05-16T23:40:19.081Z |
| Headline source | Publisher (no WeSearch rewrite) |
| Excerpt source | publisher body |
| Excerpt method | First ~120 words (~800 chars) of extracted publisher body, fair-use limited. |
| Summary | WeSearch · cerebras-chat (WeSearch summarizer) |
| Summary source text | contentText |
| Citation coverage | Summary is a WeSearch-generated derivative; primary citation is the original publisher URL. |
| Cluster | PdWA_WrgcBtb |
| Cluster logic | Grouped by semantic title/content similarity across sources within a rolling window. Same-publisher template collisions are excluded from coverage comparison. |
| Ranking reason | Story pages are not engagement-ranked. Hub feeds use recency, with optional source-diversified chronological ordering (cap consecutive stories per source). No personalized ranking. |
| Publisher visit | Yes — open original |
| Substitutes article? | No — link-out required for full text |
Rights status (four layers)
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| Indexing | May the item be indexed (stored, ranked, made findable)? | Allowed |
| Snippet | May a short excerpt of the publisher's text be shown? | Allowed |
| AI summary | May WeSearch generate its own short summary of the article? | Limited |
| Retrieval / RAG | May the content be exposed for third-party retrieval-augmented generation? | Not asserted |
| Model training | May the content be used to train AI models? | Not asserted |
| Commercial reuse | May the content be reused commercially? | Not permitted |
Basis: Derived from the published RSS/Atom feed. Contact: [email protected]. Reviewed: 2026-07-24.
Opening excerpt (first ~120 words) tap to expand
Does my brain live a little in the past? Yes, your brain does live a little in the past. It can't help it. The information it receives via your senses is always a little out of date. Whether it’s light entering the retinas in your eyes, or sounds vibrating the hairs in your ears, it not only takes time for the data to arrive, but your brain then has to process it. Unfortunately, data transmission in your brain is sluggish. Even your fastest neurons can only manage about 431km/h (268mph), which is a lot slower than copper wire at 1.08 billion km/h (669 million mph). The result of this is that what you’re sensing now, actually occurred in the world around 100 milliseconds ago (about a tenth of a second).
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Excerpt limited to ~120 words for fair-use compliance. The full article is at BBC Science Focus Magazine.
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