The Challenger Deep, the deepest known point in the Mariana Trench, lies about 10,935 meters (35,876 feet) below sea level — deeper than Mount Everest is tall (approximately 8,849 meters / 29,032 feet).
Notes on verification
Corrected 2026-09-06 verification pass: original wording ('about 36,000 feet') was a rounded figure; NOAA National Ocean Service gives Challenger Deep as 10,935 meters (35,876 feet). NOAA Repository (2020 submersible transects) gives the same figure with ±6 m at 95% CI. Everest height per USGS is approximately 8,849 m (29,032 ft). Primary source reassigned from National Geographic Pacific Ocean article (source_id=123) to NOAA National Ocean Service (see fact_sources). Cleared aggregator_dropped_primary_exists and wikipedia_dropped_other_sources_exist flags. [tier=silver indep_score=0.900 clusters=2 claim_tier=everyday reviewed_by=verification_pass_2026_09_06]
Sources
- The Pacific Ocean—facts and information (seed:science_and_space)
- How deep is the ocean? - NOAA's National Ocean Service (primary:noaa)
- https://www.cnn.com/2023/06/23/world/mariana-trench-challenger-deep-facts-scn/index.html (corroboration)
- https://www.history.com/articles/mariana-trench-hms-challenger (corroboration)