(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.
Nasa's theory suggests life originated in warm, alkaline springs in Earth's ancient oceans NASA/Reuters Nasa have explained a theory which answers one of our biggest questions: How did life on Earth began? A new study from researchers at Nasa's Jet Propulsion Laboratory has proposed the water world theory as the answer to our evolution, which describes how electrical energy naturally produced at the sea floor might have given rise to life.