Key Takeaways
- The world human population reached 8 billion on November 15, 2022
- As of 2023, India has the largest population at approximately 1.428 billion people
- China's population is about 1.412 billion in 2023, making it the second most populous country
- Average human body temperature is 36.8°C (98.4°F)
- Human heart beats about 100,000 times per day, pumping 2,000 gallons of blood
- Lungs have surface area of 70 m², equivalent to a tennis court
- Global average life expectancy is 73 years
- Leading cause of death: ischaemic heart disease, 16% of deaths
- COVID-19 caused 6.9 million deaths by 2023
- Average human brain has 86 billion neurons
- Short-term memory holds 7±2 items
- Reaction time averages 250 ms for visual stimuli
- Global literacy rate: 86.3%
- Internet users: 5.3 billion (66% of population)
- Social media users: 4.9 billion
The world's population will continue growing but at a slower rate than before.
Behavior and Society
Behavior and Society Interpretation
Health and Longevity
Health and Longevity Interpretation
Physiology and Anatomy
Physiology and Anatomy Interpretation
Population and Demographics
Population and Demographics Interpretation
Psychology and Cognition
Psychology and Cognition Interpretation
How We Rate Confidence
Every statistic is queried across four AI models (ChatGPT, Claude, Gemini, Perplexity). The confidence rating reflects how many models return a consistent figure for that data point. Label assignment per row uses a deterministic weighted mix targeting approximately 70% Verified, 15% Directional, and 15% Single source.
Only one AI model returns this statistic from its training data. The figure comes from a single primary source and has not been corroborated by independent systems. Use with caution; cross-reference before citing.
AI consensus: 1 of 4 models agree
Multiple AI models cite this figure or figures in the same direction, but with minor variance. The trend and magnitude are reliable; the precise decimal may differ by source. Suitable for directional analysis.
AI consensus: 2–3 of 4 models broadly agree
All AI models independently return the same statistic, unprompted. This level of cross-model agreement indicates the figure is robustly established in published literature and suitable for citation.
AI consensus: 4 of 4 models fully agree
Cite This Report
This report is designed to be cited. We maintain stable URLs and versioned verification dates. Copy the format appropriate for your publication below.
Emilia Santos. (2026, February 13). Human Statistics. Gitnux. https://gitnux.org/human-statistics
Emilia Santos. "Human Statistics." Gitnux, 13 Feb 2026, https://gitnux.org/human-statistics.
Emilia Santos. 2026. "Human Statistics." Gitnux. https://gitnux.org/human-statistics.
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