From: Jed Rothwell I do not think there is any evidence for muons in cold fusion. JB: There is actually plenty of evidence along with plenty of data some of which was presented. You may not think the evidence is credible, but you are not a nuclear engineer
➢ People who are nuclear engineers and nuclear physicists don't think so either. Some do, some don’t. George Miley for instance, who has far stronger credentials than most critics of Holmlid, was actually a co-author with him. ➢ The main reason I know of is that if there were lots of muons, they would cause harm, and there is no sign of harm. There is not much sign of harm for airline crews who spend many hours at altitude where muons are present in high flux. Furthermore, Holmlid has suffered a health issue recently which could have been aggravated by exposure to muons. The jury is out on this issue. In fact, muons are weakly interacting with light elements like carbon so health issues are not expected but no one knows. The Curie’s health problems, for instance, is a situation where they were exposed to muons, in addition to gamma radiation, but no one has revisited the old cases to estimate relative risks. Actually, there are stronger arguments against muons than health issues but what is needed is a stronger independent replication. Since the so-called “Letts-Cravens effect” is similar to Holmlid’s technique and has been replicated by others, it is conceivable that some kind of hybrid experiment will emerge… sooner rather than later, it is hoped.

