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Property Organism Value Units ID Details
Present global atmospheric oxygen level Biosphere 20.946 (±0.006) volume % 116086 Duursma EK, Boisson MPRM...
Fraction of the four billion species estimated to have evolved on the Earth over the last 3.5 billion years that are extinct Biosphere ~99 % 112752 Barnosky AD et al., Has...
Number of described species of beetles (Coleoptera, the most species-rich group of organisms on Earth) Insect ~360,000 described species 113121 Bouchard P et al., F...
Age of ancient fossilized evidence of life Biosphere isotopic metamorphosed sedimentary rocks 3,700-3,800: stromatolites 3,700: molecular clock >4,000 Mya 113264 Nutman AP, Bennett VC...
Fration of lithosphere that is silicon Biosphere 27 % 114430 Tréguer P et al., The...
Oxygen (O2) and carbon dioxide (CO2) data for atmosphere and oceans Biosphere Table - link N/A 116089 Duursma EK, Boisson MPRM...
Evolution of oxygenic photosynthesis by cyanobacteria Biosphere ~2.8 Billion years ago 114975 Kihara S, Hartzler DA...
Fraction of the 1.9 million known recent species that are recorded as extinct Biosphere 0.04 ((799 species)) % 117269 Régnier C et al., Mass...
Number of described species Invertebrates ~1.4 million species 117270 Régnier C et al., Mass...
Fraction of insect species per taxonomic order that have contracting ranges in the UK Biosphere 30 - 60 % of species per taxonomic order 117267 Ceballos G, Ehrlich PR...
Origin of mammals and dinosaurs vertebrates 210 - 230 Mya 113318 Smith et al., Body size...
Wingspan of Meganeura spp., extinct flying insects ~3 times the size of the largest flying insects today Insect >65 - 71 cm 113319 Smith et al., Body size...
Span of insect evolutionary history Insect 300 million years 113320 Smith et al., Body size...
Thickness of shell beds (biogenic sediments) Biosphere paleozoic-a few centimeters to tens of centimeters: post-Paleozoic >1meter N/A 113321 Smith et al., Body size...
Body size variation across domains of life Various Table - link N/A 113313 Smith et al., Body size...
Increase in mass-specific energy demand from giraffe to animal the size of deer mouse Mammals ~20 fold greater in deer mouse than in giraffe 113314 Smith et al., Body size...
Lower boundary of the viable size of newborns in aquatic environmets Mammals ~5 kg 113315 Smith et al., Body size...
Origin of microscopic cyanobacteria-like organisms and their biovolume Cyanobacteria evolved by ∼3,500 - 3,400Mya: biovolume of ∼3.4×10^−6mm^3 N/A 113316 Smith et al., Body size...
Size of large marine invertebrates Invertebrates sponge Xestospongia muta >7m^3: tube worm Riftia pachyptila >3m: jellyfish Nemopilema nomurai >3m N/A 113317 Smith et al., Body size...
Density of sea water Biosphere ~1027 kg/m^3 108511 Windows to the universe...