Claims vs outcomes
Cold Fusion Claims Timeline Explorer
Filter the cold-fusion record by original claims, replication attempts, official reviews, modern research, funding, and commercial claims.
Key facts
Key facts
Coverage
1920s-2025
Events span early electrolysis claims, 1989, DOE reviews, Google, ARPA-E, E-Cat, and recent solid-target work.
Filter
Outcome
Separate original claims from negative replications, official reviews, unverified claims, and modern research.
Sources
Linked
Each event points readers back to the bibliography or a primary/source-context record.
Filter claims, reviews, and replication outcomes
The category labels separate what was claimed from what later tests and reviews found.
Early electrolysis fusion claims
Pre-1989 claims of fusion during electrolysis show that the idea was not wholly new when Fleischmann and Pons announced their result.
Source: 1989 DOE reportFleischmann and Pons press conference
The University of Utah announcement framed palladium-heavy-water excess heat as possible room-temperature fusion.
Source: Berkeley case studyPreliminary Journal of Electroanalytical Chemistry paper
The preliminary paper reported anomalous heat and interpreted it as a nuclear process, but it was not independent validation.
Source: Fleischmann-Pons paperCaltech calorimetry critique
The Caltech/Nathan Lewis analysis challenged whether the published heat evidence justified the claimed excess power.
Source: Miskelly et al.Harwell upper-bounds study
Harwell and collaborators reported no sustained support for the claims using multiple calorimeters and nuclear diagnostics.
Source: Harwell Nature paperDOE/ERAB panel report
The 1989 DOE panel recommended against special cold-fusion programs while allowing modest peer-reviewed work.
Source: DOE/ERAB reportJapan New Hydrogen Energy project
Japan supported metal-hydrogen research through MITI/NEDO-linked programs, but no public independently validated energy device emerged.
Source: Kasagi historyDOE LENR review
The DOE Office of Science review found LENR had not been conclusively demonstrated, while encouraging normal peer review for targeted experiments.
Source: 2004 DOE reviewIndustrial Heat statement on E-Cat
Industrial Heat said it had worked for years to substantiate Rossi E-Cat results without success.
Source: Industrial Heat statementGoogle-backed Nature program
A multi-institution program reported no evidence of a cold-fusion effect while identifying useful materials-science questions.
Source: Google Nature paperARPA-E LENR exploratory funding
ARPA-E selected eight exploratory LENR projects aimed at irrefutable demonstrations and nuclear diagnostics.
Source: ARPA-E annual reportElectrochemical loading and ion-driven D-D fusion
A Nature paper reported enhanced D-D fusion rates in a deuterium-loaded palladium target under ion bombardment, without claiming a practical reactor.
Source: 2025 Nature paperMeasurement standard
Numbers are a filter, not a verdict
These tools are designed for first-pass evaluation. A striking COP, timeline entry, or energy-density result should lead to better questions: Were blanks run? Were all energy paths measured? Was the protocol repeated independently? Does a nuclear signature scale with the claimed heat?
For the consensus baseline, read the scientific verdict. For the measurement pitfalls behind the calculator, read the replication crisis.
FAQ
Common questions
Why include both claims and negative replications?
The cold-fusion story is defined by the gap between extraordinary claims and later replication outcomes, so both belong in the same timeline.
Does modern LENR funding mean the 1989 claim was right?
No. Modern funding means some narrow questions are being tested under better controls; it does not validate the original tabletop energy claim.
Are commercial claims treated differently?
They are labeled as unverified unless independent, open, peer-reviewed testing establishes the claimed performance.