
One of the primary open questions of astrobiology is whether there is extant or extinct life elsewhere the Solar System.
One of the primary open questions of astrobiology is whether there is extant or extinct life elsewhere the Solar System.
Large, robust, lens-shaped microfossils from the approximately 3.4 billion-year-old Kromberg Formation of the Kaapvaal Craton in eastern South Africa are not only among the oldest elaborate microorganisms known.