Period complete · 2019-01-01 to 2019-12-31
2019: changing the map and timeline
Two selected studies changed different dimensions of the record: direct Denisovan evidence on the Tibetan Plateau and the age of a late Homo erectus occurrence in Java. Range and chronology need separate evaluation.
- Evidence through
- Selected sources
- 2
- Editorial update
- 2026-10-09
01 · EDITORIAL ANALYSIS
Denisovans become visible on the Tibetan Plateau
- The finding
- Ancient proteins connect the Xiahe mandible to Denisovans; attached carbonate provides a minimum age of approximately 160,000 years.
- What changed
- Direct fossil evidence extends beyond the Altai and into a high-altitude setting.
- Possible consequences
- Geographic and environmental models can now be tested against a fossil with molecular support.
- Evidence limits
- This is a protein-based attribution, not a recovered nuclear genome. A minimum age is not an exact age, and the specimen alone does not establish continuous occupation or a physiological adaptation.
Sources: Chen et al.
02 · EDITORIAL ANALYSIS
A narrower age range for the Ngandong bone bed
- The finding
- A chronology combining radiometric estimates models the Ngandong bone bed to 117,000–108,000 years ago.
- What changed
- The study narrows the age range for this late Homo erectus occurrence.
- Possible consequences
- Comparisons with other Southeast Asian hominins can use a better-supported local age range.
- Evidence limits
- Associated deposits and fauna supply the chronology. This is not a date for extinction everywhere. The paper was online in December 2019 despite a January 2020 issue date.
Sources: Rizal et al.
Questions still open
- Compare later Baishiya evidence with the original mandible attribution.
- Treat subsequent chronological revisions as changes to particular occurrences before extending them to species-wide histories.