Extragalactic cosmic ray Extragalactic cosmic ray Extragalactic cosmic rays are very-high-energy particles that flow into the Solar System from beyond the Milky Way galaxy. The energies these particles possess are in excess of 10 eV. Unlike solar or galactic cosmic rays, little is known about the origins of extragalactic cosmic rays. This is largely due to a lack of statistics: only about 1 extragalactic cosmic ray particle per square meter per year reaches the Earth's surface (see figure). There are many ideas about which processes may be responsible for cosmic rays with such high energies. In the 'bottom-up' approach, cosmic rays gain more
Baka Beyond album, "The Rhythm Tree", refers to this project. "It was all out of this one tree," Cradick told BBC World Service's Outlook programme. "They all use these trees – they beat on the buttress roots as the bass drum. So we called the album the Rhythm Tree." Through the charity Global Music Exchange Baka Beyond continue to work with the Baka with healthcare, education and in obtaining national ID cards that give the Baka basic rights as citizens, normally denied them due to their extreme poverty and "unconventional" lifestyle. The Music House has now become a centre for the Baka