(ËvÉr bÉl) adj. 1. of or consisting of words: verbal ability. 2. spoken rather than written; oral: verbal communication. 3. concerned with words only, rather than with the ideas, facts, or realities expressed: a purely verbal distinction. 4. corresponding word for word; verbatim: a verbal translation.
Because their hypothesis requires that Earth arose from water-containing materials already present in the inner solar system, it's called the wet-accretion hypothesis. Most of Earth's water has an indigenous origin, says Drake.
It was born when a wandering planet crashed into the young Earth. Huge amounts of material were thrown into space, eventually coming together to form the Moon. This 'big splash' theory would explain why the Moonâs rocks are very similar to those on the Earth.