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 possibility remained that liquid ethane and methane might be found on Titan's poles, where it was expected to be abundant and stable.

Liquid ethane and methane might be discovered on Titan's poles. The possibility hasn't been ruled out. Both gases should be stable and available in large quantities.