Today, most life on Earth is supported by oxygen. But ancient microbial mats existed for a billion years before oxygen was present in the atmosphere. So what did life use instead? Source: https://earthsky.org/earth/ancient-microbial-life-arsenic…
Tag: ancient world
4 amazing astronomical discoveries from ancient Greece
The ancients made some jaw-dropping discoveries without modern technology. For example, the size of the moon. Source: https://earthsky.org/space/4-amazing-astronomical-discoveries-ancient-greece…