Originally posted by the Voice of America. Voice of America content is produced by the Voice of America, a United States federal government-sponsored entity, and is in the public domain. Scientists Discover Ancient Microbial Life 5 Kilometers Below Sea Level VOA News Living microbes, possibly millions of years old, have been discovered more than five kilometers beneath the Pacific Ocean's surface, in an area believed to have been devoid of life. In a study published Tuesday, Japanese and American scientists described what they found in sediment samples taken from a flat, wide area 3.7 kilometers to 5.7 kilometers below the ocean's surface, known as an abyssal plain. Because of their depth and the limited organic material in the sediment found there, these areas were long believed unable to support life. .