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Old 02-16-2018, 03:03 PM
Steven Estes Steven Estes is online now
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First organism large enough to be seen by human eye (if there were humans then)

In the four billion years of the evolution of life, what was the first organism large enough to be seen by the naked human eye (if there had been human beings then,)
If the answer is something like coral, what is the first not an accumulation...
Old 02-16-2018, 03:12 PM
Darren Garrison Darren Garrison is offline
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If you allow for a colonial/collective organism, stromatolites. If a single multicellular organism, possibly something ancestral to one of these weirdos.
Old 02-16-2018, 03:19 PM
Colibri Colibri is offline
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Impossible to know, since the first organisms large enough to see would have been soft bodied and would not have left fossils. However, the first macroscopic fossils of single organisms seem to date to about 2.1 billion years ago. However, they are just smudges of carbon that don't really reveal what kind of organisms made them.

Stromatolites go back about 3.7 billion years ago, but these represent mats of cyanobacteria (blue-green "algae") and not single organisms.
Old 02-18-2018, 12:51 PM
MrDibble MrDibble is online now
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The first complex multicellular life we know of for certain is the Ediacara fauna. 600 Ma.
Old 02-22-2018, 09:24 PM
GuanoLad GuanoLad is online now
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David Attenborough made a documentary series called First Life that you might gain some knowledge from.
Old 02-23-2018, 01:08 PM
Elendil's Heir Elendil's Heir is online now
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Obligatory Far Side reference:


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