Sentences with phrase «modern animals appear»
Then came the Cambrian explosion, which gave rise to a huge diversity of life forms: most types of modern animals appear in the fossil record from this era.
http://www.faith.org.uk/ Not exact matches
No one claims that a proper cell as known in today's modern plants and animals just appeared one day.
These proxies seemed to indicate that oxygen concentrations in the oceans rose in several steps, approaching today's sea - surface concentrations at the start of the Cambrian, around 541 million years ago — just before more - modern animals suddenly appeared and diversified.
none of the real costs — polluted land, poisoned water, air barely breathable, horrifically abused animals, the scourge of modern diseases and physical degeneration — appear on agribusiness accounting ledgers.
On the surface, that may appear to be true, especially in modern man, but an expert in the field of «fear psychology» (or animal behavior, or anthropology, etc.) should know better.
In any case the indisputable testimony of the geologic column reveals that in the last 500 million years (since the Cambrian explosion when most of the modern phyla appeared and Ediacaran phyla disappeared) and animals started crawling out onto land the CO2 level in the atmosphere has, most of time, been 10 to 20 times greater concentration than today.