Mastodon (band) band for personal reasons after just a couple of months. After recording a four-song demo and a 7-inch picture disc through Reptilian Records, Mastodon landed a record deal with Relapse Records in 2001. Mastodon released the EP "Lifesblood" in 2001, and its first full-length album, "Remission", in 2002, with the singles "March of the Fire Ants" and "Crusher/Destroyer" (which was also featured on "Tony Hawk's Underground"). On each of Mastodon's first three full-length albums the last track was an instrumental composition with a title that related to the Elephant Man. The band's second full-length album, "Leviathan", was released in 2004.
Extinct radionuclide long half-lives. A partial list of radionuclides not found on Earth, but for which decay products are present: Notable isotopes with shorter lives still being produced on Earth include: Radioisotopes with half-lives shorter than one million years are also produced: for example, carbon-14 by cosmic ray production in the atmosphere (half-life 5730 years). Extinct radionuclide An extinct radionuclide is a radionuclide that was formed by nucleosynthesis before the formation of the Solar System, about 4.6 billion years ago, and incorporated into it, but has since decayed to virtually zero abundance, due to having a half-life shorter than about 100 million