This article tells how we have not yet found any other Earth like planets, but it is counted on that we will continue to look because of our races fascination with extraterrestrial life. It poses questions like is our world a common occurrence or an outlier, or, is it possible that a planet unlike our own can harbor life. This article continues to tell how there are many factors that lead into important qualities that an extra solar planet must have to be like ours.
This scholarly source proves useful when it comes to the subject I have chosen because it touches on the procedures we go through to find these types of other Earths which leads into cost. Helpfully, it shows that we may or may not want to keep funding these tests.