Simplify the following text for a Grade 14 native English-speaking person.
Original: The RNA world hypothesis suggests that relatively short RNA molecules could have spontaneously formed that were capable of catalyzing their own continuing replication .
Simplified: The RNA world hypothesis describes an early Earth with self-replicating and catalytic RNA but no DNA or proteins . This has spurred scientists to try to determine if relatively short RNA molecules could have spontaneously formed that were capable of catalyzing their own continuing replication .