[Renfield]

Ping

[James C. Bennett]

Fish do one-way respiration, so it’s not surprising that reptiles do it too, being as close they are to fish evolutionary-wise, scales and all.

[SatinDoll]

“Why remains a mystery.”

The answer is found in rocks from that long ago time - about ancient atmosphere. There was a global oxygen collapse.

It did not happen quickly but over time. The formation and breakup of Gondwanaland was central to this event.

The animals you’ve referred to all have the ability to store air in their bodies. Those reptiles that did not went extinct.

The best read on this event is: Out Of Thin Air, by Peter D. Ward.

[SkyDancer]

And in other news we could be breathing air that’s millions of years old. >hak< >coff< >coff<

[spel_grammer_an_punct_polise]

I always accused my wife of wearing an oxygen tank on her back that would automatically pump oxygen into her lungs so that she did not have to stop talking in order that she could breathe! ;-)

Now I know how she does it! ( It is lucky that she does not read FR! )

[ETL]

I assumed lizard breath came from improper oral hygiene.

[Caipirabob]

Oh, wrong thread...or not?

[Redcitizen]