Wildlife of the Falkland Islands a hunting dog. However, a 2009 DNA study by scientists at UCLA suggested that the warrah arrived on the islands long before humans migrated to the New World, possibly during one of the particularly intense cold intervals 340,000 years ago, 150,000 years ago or 25,000 years ago. Its nearest relative was the maned wolf, an extant South American canid. It became extinct in the mid-19th century as human settlement spread. 14 species of marine mammals including killer whales, Peale's dolphins, Commerson's dolphins, leopard seals, southern elephant seals, and southern sea lions frequent the surrounding waters. The elephant seal, the fur
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