Analysis of debris from the nearly 5 billion-year-old asteroid Bennu suggests the building blocks of DNA and RNA were present ...
Despite the stark differences between today’s world and that of the Archean, it is clear that at both times ... crust existed so early in Earth’s history, was life present as well?
Life on Earth began over four billion ... Originating in the Eocene epoch, tapirs have undergone relatively little change in their basic form since then. These semi-solitary herbivores are ...