The Manual Autoclave is primarily used by veterinarians or surgeons, but is also used in a range of other settings, including active surgery center, medical practice, dental office, schools, industrial lab, doctor's clinic, or tattoo establishment. Tuttnauer M Series Manual Autoclave Features: Reliable and durable.
Vote for this answer. It is estimated that the first life forms on earth were primitive, one-celled creatures that appeared about 3 billion years ago. That's pretty much all there was for about the next two billion years. Then suddenly those single celled organisms began to evolve into multicellular organisms.
Life arose from this life-less but churning mess sometime during the first several hundred million years of Earth's existence, but the details are inaccessible. The oldest trace of life may be a chemofossil from a 3.8 billion year old rock in Greenland.