This undated image released by Bob Goldstein and Vicki Madden taken with an electron microscope, shows a micro-animal &quot;tardigrade&quot; also known as a water bear, at the UNC in Chapel Hill, N.C. In Jan. 2015, scientists found the DNA of a tardigrade in Antarctica's Lake Vostok, located in an area considered the most remote place on Earth. The mostly freshwater lake is buried under miles of ice, and hasn&iacute;t been near open air for 15 million years, exciting astronomers who search for possible forms of life on other planets. (AP Photo/Bob Goldstein &amp; Vicki Madden, UNC Chapel Hill)