Published at 890 × 500 in Giant bacteria shed light on life without oxygen
An artist’s impression of the earth’s surface billions of years ago. The planet had almost zero oxygen in its atmosphere, but there was still life: microorganisms living in the globe-spanning ocean, long before today’s continents were formed. (National Geographic – The Story of Earth)
An artist’s impression of the earth’s surface billions of years ago. The planet had almost zero oxygen in its atmosphere, but there was still life: microorganisms living in the globe-spanning ocean, long before today’s continents were formed. (Image: National Geographic – The Story of Earth)
