Some results are described that derive from the assumption that very low energy (≈ eV) electron-proton, electron-deuteron, and electron-triton resonance particle systems (denoted π, δ, and τ-hydrons) are created in various materials and experiments. Information regarding the resonance width and lifetime is extracted from the data of cluster-impact fusion experiments, and these experiments are discussed in connection with other anomalous experiments, including cold fusion experiments, which are examples of a new class of hydron-mediated nuclear reactions—resonant direct nuclear reactions.