The facts that the energy density of cosmic rays is the same as that of starlight, the energy range - per particle - extends to the highest energies known to mankind and that we do not know where cosmic rays come from all lead to the subject of origin being an exciting one.

The lecture will survey the scene - from 10⁹ eV to 10²⁰ eV - and give the author's own preferences.

• abstractwolfendale.pdf [8056 bytes]
• abstractwolfendale.doc [37376 bytes]