[kinoxi]

Verification (1981 - 82): LaViolette was the first to measure the extraterrestrial material content of prehistoric polar ice. Using the neutron activation analysis technique, he found high levels of iridium and nickel in 6 out of the 8 polar ice dust samples (35k to 73k yrs BP), an indication that they contain high levels of cosmic dust. This showed that Galactic superwaves may have affected our solar system in the recent past.

There can be more than one explanation for what some of these 'verifications' state. Some of these strange hypotheses can be interesting though.
Ping to self for later read.

[kinoxi]

ping.