Definition: Rewrite each original sentence in order to make it easier to understand by non-native speakers of English. You can do so by replacing complex words with simpler synonyms (i.e. paraphrasing), deleting unimportant information (i.e. compression), and/or splitting a long complex sentence into several simpler ones. The final simplified sentences need to be grammatical, fluent, and retain the main ideas of their original counterparts without altering their meanings.
Input: The Sahara Pump Theory is a hypothesis that explains how flora and fauna left Africa to penetrate the Middle East and then Europe and Asia.

The Sahara Pump Theory: explains flora and fauna's travel from Africa to the Middle East, Europe, and Asia.