Econintersect: Warning: The headline is slightly misleading. This article is about the possibility of life on other planets and evidence of such life that has 
been found on material from space that has reached earth. There are no videos of actual alien life. The two video slide shows in the group accessible after the Read more … break come from MSN. The first covers the ten most habitable planets known at the present time. The similarity to earth ranges from 90% all the way up to 99%. One specific factor that is compared to earth is the estimated average surface temperatures which range from 30 F to 1250 F. Six of the planets have average temperature estimates with very earthlike numbers, ranging from one with a chilly average of 460 F to two with a steamy 840 F.
The second video in the series cites the top ten scientific indications that life may exist elsewhere in our solar system, galaxy and universe. Included in the series are examples of primitive life forms (and fossil evidence of life) that have already arrived on earth from space.
In January GEI News reported that researchers had estimated that there were possibly 50 million habitable planets in our own Milky Way galaxy. Two months later another research paper estimated the number could be in the billions. Only a few of those astronomical number of planets (apologize for pun) have actually been located and are being measured for basic properties such as estimated average surface temperature.
Sources:
- Most Likely Habitable Planets and Signs of Extraterrestrial Life (MSN, Video All-Time Top Ten Series)
- 50 Million More earths in the Milky Way? (GEI News, 18 January 2012)
- Billions of Habitable Planets in Milky Way Galaxy? (GEI News, 31 March 2012)
