Most interesting result at variance with the current knowledge:
“These findings suggest that the knee observed in the all-particle spectrum corresponds to
the knee of the light component, rather than the medium-heavy components. “
https://urldefense.com/v3/__https://physics.aps.org/articles/pdf/10.1103/...
https://urldefense.com/v3/__https://journals.aps.org/prl/pdf/10.1103/Phys...