methanogens
32Escherichia coli — E. coli redirects here. For the protozoan parasite, see Entamoeba coli. For the 2011 E.coli outbreak, see 2011 E. coli O104:H4 outbreak. For a specific strain, see Escherichia coli (disambiguation). For Escherichia coli in molecular biology, see… …
33Europa (moon) — Europa Europa s trailing hemisphere in approximate natural color. The prominent crater in the lower right is Pwyll and the darker regions are areas where Europa s primarily water ice surface has a higher mineral content. Imaged on September 7,… …
34Titan (moon) — Titan Titan in 2005 by Cassini spacecraft Discovery Discovered by Christiaan Huygens …
35Gaia hypothesis — The study of planetary habitability is partly based upon extrapolation from knowledge of the Earth s conditions, as the Earth is the only planet currently known to harbour life. The Gaia hypothesis, also known as Gaia theory or Gaia principle,… …
36Oil palm — African Oil Palm (Elaeis guineensis) Scientific classification Kingdom: Plantae …
37Tailings — A panorama of Broken Hill, New South Wales, backed by the man made mullock (waste tailings) heaps from the Line of Lode mine (the mullock heaps are the hills that stretch across this image). Tailings, also called mine dumps, slimes, tails, leach… …
38Hydrogen hypothesis — The hydrogen hypothesis is a model proposed by William Martin and Miklós Müller in 1998 that describes a possible way in which the mitochondrion arose as an endosymbiont within a prokaryote (an archaebacterium), giving rise to a symbiotic… …
39Abiogenic petroleum origin — is a largely abandoned hypothesis that was proposed as an alternative to theory of biological petroleum origin. It was relatively popular in the past, but it went largely forgotten at the end of the 20th century after it failed to predict the… …
40Diazotroph — Diazotrophs are bacteria and archaea that fix atmospheric nitrogen gas into a more usable form such as ammonia.[1] A diazotroph is an organism that is able to grow without external sources of fixed nitrogen. Examples of organisms that do this are …
