REF: UAP/1950s/062Contested
1957 (fall)
Ubatuba magnesium fragments
Ubatuba, SP · Brazil·Physical material case·1950s
Contested
§ ASummary
Fragments from an object said to have exploded over beach were mailed to a columnist; ultra-pure magnesium analyzed repeatedly (APRO, Condon, later labs) with contested isotopic/purity findings.
§ BWitnesses
Anonymous donor letter; analyses by Dr. Fontes, Condon lab, Sturrock panel labs
§ CEvidence & Documentation
Surviving fragments (chain of custody partial); multiple lab reports
§ DOfficial Investigation
Condon Committee analysis; later Sturrock/CUFOS studies
§ EStatus Assessment
Contested: purity within earthly capability per Condon; anomalies argued by others; material still exists
§ FVerifiable Sources
Condon Report; Sturrock, 'The UFO Enigma' (1999); APRO records
§ GCross-referenced cases6
1957-10-16🇧🇷 Brazil
Antonio Villas Boas abduction claim
Abduction claim (first widely documented)
1957-11-04🇧🇷 Brazil
Fort Itaipu sentry burn case
Military / physiological effects
1958-01-16🇧🇷 Brazil
Trindade Island photographs
Photographic (naval)
1955-08-21🇺🇸 USA
Kelly-Hopkinsville encounter
Close encounter / entities
1956-08-13-14🇬🇧 UK (USAF bases)
Lakenheath-Bentwaters radar-visual
Radar-visual with intercept
1957-07-17🇺🇸 USA
RB-47 electronic intelligence case
Radar-visual-ELINT