demo · HACKER NEWS RECOMMENDATION
How the pyramids were built in Egypt
Geopolymer Institute · 1 HN recommenders · 1 recommendation months
Recommended by 1 Hacker News commenters across 1 months (2017–2024).
SignalTube analysis
Among 9 other demo videos tagged Civil engineering & construction, the mean is 1.3 distinct HN recommenders. This video has 1 distinct HN recommenders, below that mean. Recommendations span 1 distinct month; the peer average is 1.4 months. This is a data-derived comparison, not a human review or quality rating.
25% of its 4 labeled comments are marked as recommendations or strong recommendations. HN mention years are 2017–2024; those years describe discussion history, not upload date. Its verified runtime is 4 minutes 42 seconds. YouTube lists its publication date as 2006-12-01.
- Channel / speaker
- Geopolymer Institute
- Verified runtime
- 4m 42s
- YouTube upload date
- 2006-12-01
- Hacker News mention years
- 2017–2024
SAME TOPIC AND FORMAT
Compare with related videos
The comparison cohort uses other demo videos in Civil engineering & construction. “Shared recommenders” counts HN users who recommended both videos in the source graph.
| Video | HN recommenders | Recommendation months | Positive label share | Shared recommenders | Runtime | Upload date |
|---|---|---|---|---|---|---|
| How the pyramids were built in EgyptCurrent video | 1 | 1 | 25% | — | 4m 42s | 2006-12-01 |
| Taipei 101 Damper movement on 12 May 08demo · phuaalvin | 4 | 4 | 100% | No recorded overlap | 2m 16s | 2008-05-14 |
| Primitive Technology: Tiled Roof Hutdemo · Primitive Technology | 3 | 4 | 67% | No recorded overlap | 14m 9s | 2015-09-05 |
| Boeing 777 Wing Testdemo · mtthw0 | 2 | 2 | 20% | No recorded overlap | 3m 17s | 2010-07-07 |
THREE SOURCE-BASED CONTEXT POINTS
Why Hacker News recommends it
Each note combines the dataset’s stance label and short rationale; comment bodies are not reproduced. Open the HN source for the original discussion.
The archive classifies this as a recommendation in “How the pyramids were built with ancient concrete”. Its short rationale: Demonstration and chemical analysis of pyramid concrete theory.
The archive classifies this as a contextual reference in “Alternative materials could shrink concrete’s giant carbon footprint”. Its short rationale: Davidovits' claim that pyramids were built from geopolymer.
The archive classifies this as a contextual reference in “An Archaeologist Challenges Mainstream Scientific Thinking (2017)”. Its short rationale: the source snapshot has no short rationale for this mention.