Number of People Who Have Ever Lived on Earth
|
Human Homo sapiens |
1.08e+11 |
Humans |
111241 |
Population Reference... |
Total carbon of prokaryotes on earth as percent of carbon found in plants
|
prokaryote |
~60 to 100 |
% |
108510 |
William B. Whitman,*†... |
Number of cells of bacteria and archaea estimated to inhabit Earth
|
Biosphere |
~10^30 |
cells |
113931 |
Locey KJ, Lennon JT.... |
Fraction of Earth’s ice-free land area covered by alfisols (a soil type)
|
Biosphere |
13.5 |
% |
113323 |
Hicks Pries CE, Castanha C... |
Ratio of ozone to oxygen in the stratosphere of present-day Earth
|
Biosphere |
~5×10^-5 |
unitless |
115037 |
Kihara S, Hartzler DA... |
Fraction of number of individual animals that once shared the Earth with humans that are extinct
|
Biosphere |
≤50 |
% of individual animals |
117268 |
Ceballos G, Ehrlich PR... |
Fraction of oxygen consumption by living organisms on earth by cytochrome oxidase
|
Biosphere |
90 |
% |
103301 |
Wong-Riley MT. Cytochrome... |
Number of animal species catalogued in a central database as of 2011 and number of predicted species on Earth
|
Eukaryotes |
Catalogued ~950,000 Predicted ~7,770,000 Table - link |
species |
109318 |
Mora C, Tittensor DP... |
Number of archaea species catalogued in a central database as of 2011 and number of predicted species on Earth
|
Archaea |
Catalogued 502 Predicted 455 Table - link |
species |
109322 |
Mora C, Tittensor DP... |
Number of plant species catalogued in a central database as of 2011 and number of predicted species on Earth
|
Plants |
Catalogued ~216,000 Predicted ~298,000 Table - link |
Species |
109319 |
Mora C, Tittensor DP... |
Number of fungi species catalogued in a central database as of 2011 and number of predicted species on Earth
|
Fungus |
Catalogued ~43,000 Predicted 611,000 Table - link |
Species |
109320 |
Mora C, Tittensor DP... |
Number of protozoa species catalogued in a central database as of 2011 and number of predicted species on Earth
|
Protists |
Catalogued ~8,100 Predicted ~36,400 Table - link |
Species |
109321 |
Mora C, Tittensor DP... |
Fraction of all microbial cells that inhabit the deep biosphere (accounting for a third to half of all living biomass carbon on Earth)
|
Biosphere |
94 |
% of all microbial cells |
115328 |
Braun S et al., Size... |
Present average solar radiation
|
Biosphere |
340 |
W/m^2 |
116099 |
Duursma EK, Boisson MPRM... |
Span of Geozoic (since life first appeared till present day)
|
Biosphere |
~3,600 |
Mya |
113312 |
Smith et al., Body size... |
Fraction of all the water on the Earth that is in the oceans (the rest is held as freshwater in glaciers and icecaps, groundwater, lakes, soil, the atmosphere, and within life)
|
Biosphere |
~97 |
% |
115097 |
Pidwirny, M. (2006).... |
Beginning of photosynthesis using chlorophyll pigments
|
Biosphere |
~1.8 |
Billion years ago |
116087 |
Duursma EK, Boisson MPRM... |
Beginning of atmospheric oxygen production
|
Biosphere |
~3.2 |
Billion years ago |
116068 |
Duursma EK, Boisson MPRM... |
Amount of oxygen in biosphere (for mass of total oxygen see 'Comments' section)
|
Biosphere |
Net total amount 5.63×10^20: free oxygen in the atmosphere 3.75×10^19: dissolved oxygen in the oceans 3.1×10^17: (the remainder stored in a large number of oxidized terrestrial and oceanic compounds) |
mol |
116069 |
Duursma EK, Boisson MPRM... |
Range of atmospheric oxygen in the past 600 million years
|
Biosphere |
7 - 30 |
O2 volume % |
116072 |
Duursma EK, Boisson MPRM... |