Annotaive Bibliography

 "Arsenic-Feeding Bacteria Find Exspands Traditional Notions of Life." Cnn.com. 12 Dec. 2010. Web. 4 Mar. 2011. <http://articles.cnn.com/2010-12-02/us/nasa.extraterrrestrial.life_1_arsenic-chemical-elements-nasa?_s=PM:us

NASA has announced that a new strain of bacteria has been found that uses arsenic in place of phosphorus in it’s DNA.  This shows that life can be sustained by elements we didn’t think would allow life to form.  Therefore, maybe life can exist on plants were there is no water or oxygen.

 "Mayan Spacecraft." Sulviaw.multiply.com. 2011. Web. 4 Mar. 2011. <http://silviaw.multiply.com/journal/item/401>.

This article was about the image found on the tomb of Lord Pacal.  It is a carving of what appears to be a man in an ancient spacecraft.  There are controls an engine with flams and even a breathing apparatus for oxygen.

Mayell, Hillary. "Alien Life? Atronomers Predict Contact by 2025." Nationalgeographic.com. Nation Geographic News, 14 Nov. 2003. Web. 4 Mar. 2011. <http://news.nationalgeographic.com/news/2003/11/1114_031114_setisearch.html>.

 This article talked about the new technology being used to search for life.  Astronomers are predicting contact very soon now that we can see further and with much better sensitivity

           

Tasker, Fred. "NASA:Extraterestrial Life Discovery Is a Big Deal-Really." Miamiherald.com. 2 Dec. 2010. Web. 4 Mar. 2011. <http://www.miamiherald.com/2010/12/02/1954921/nasa-new-find-a-big-deal-really.html>.

This was about the announcement made by nasa that it found a bacteria that was able to use arsenic a toxic element as a building block for its DNA.  This broadens what we now consider life.  This show that life can exist in many conditions we didn’t think were possible and maybe on planets with extreme environments.

Than, Ker. "Greatest Mysteries: Does Alien Life Exist?" Space.com. 6 Aug. 2007. Web. 4 Mar. 2011. <http://www.space.com/4158-greatest-mysteries-alian-life-exist.html>.

 This stated that  that extraterrestrial life is unlikely to be highly advanced man like creatures.  Instead more like the bacteria that we find here on earth.  Since bacteria are extremophiles they can live in very harsh environments such as many of the conditions found in space.