Because I believe there is so many earths that we don't know of.
sort by best latest
Science is finding planets similar to earth all the time. Statistically speaking the odds that there are other planets with life on them is pretty high.
You can help the HubPages community highlight top quality content by ranking this answer up or down.
Whoever hasn't does not have any imagination.
Copyright © 2017 HubPages Inc. and respective owners. Other product and company names shown may be trademarks of their respective owners. HubPages® is a registered Service Mark of HubPages, Inc. HubPages and Hubbers (authors) may earn revenue on this page based on affiliate relationships and advertisements with partners including Amazon, Google, and others.
Copyright © 2017 HubPages Inc. and respective owners.