Related by context. Frequent words. (Click for all words.) 57 biogeochemical cycles 56 mitochondrial DNA mtDNA 56 biosignatures 55 BY VINCENT MAO 54 elemental composition 54 chemical reactivity 54 geoid 52 macroevolution 52 amyloid deposition 52 multicellular organism 52 epigenetic modifications 52 lunar soil 52 tropospheric ozone 52 oceanic circulation 52 human microbiome 52 biogeographic 51 atmospheric aerosols 51 progerin 51 nanobacteria 51 phytochrome 51 unicellular 51 fluorescent molecules 51 extrasolar 51 primitive organisms 50 galactic cosmic rays 50 methanogens 50 prehistoric ancestors 50 icy moons 50 organism genome 50 methylation patterns 50 gyres 50 rainforests disrupt 50 permanently shadowed craters 50 evolutionary origins 50 antineutrinos 50 MC1R 50 strangelets 50 microbiota 50 lunar craters 50 Shewanella 50 melanosomes 50 planetary embryos 50 fluorescent probes 50 noble gases 50 biological molecules 50 % #F# 3v.jsn 49 vertebrate animals 49 marine invertebrates 49 Methylmercury 49 microbial ecology 49 gaseous planets 49 polar caps 49 eukaryote 49 geomorphological 49 epigenome 49 microfossils 49 By NATHAN BRUTTELL 49 magma ocean 49 silicate minerals 49 atmospheric pollutants 49 moon Europa 49 ribosomal RNA 49 Earth ozone layer 49 microstructural 49 planetesimals 49 geomorphology 49 inorganic mercury 49 Goldilocks planet 49 chromosomal aberrations 49 adiponectin levels 49 pre biotic 49 soliton 49 atmospheric concentrations 49 KBOs 49 mitochondrial genome 49 marine phytoplankton 49 Hawking radiation 49 protists 49 photosynthetic organisms 49 jarosite 49 coevolution 49 sulfate aerosols 49 nanomagnets 49 neuroanatomical 49 imprinted genes 49 mutated protein 49 Lake Vostok 48 Oort cloud 48 noncoding 48 terrestrial ecosystems 48 P/# A2 48 photosynthetic bacteria 48 bryozoans 48 Bruce Jakosky 48 cryosphere 48 invertebrate animals 48 aerosol particles 48 gut microbes 48 molecular underpinnings 48 apoE 48 messenger RNA molecules