something I don't get about asteroid and meteor impacts

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larval amphibians (and paedomorphic adults, like some salamanders) do have gills and extract oxygen from the water.

to LORDOFTHEMONKEYS..........i'm weird with technology, no cell phone, no text or twit, use macbook for email and internet only.....it's a wolf thing.

if you were to verbally explain to me what you meant by mutt, i would hear-------my apple is in my linus lunchbox and clint has it at the terminal.

oh god, that's really sad isn't it....or as the song goes, this is ground control to major dan, time for blastoff.

Crocs have the unique ability to diffuse CO2 in their blood into constituent atoms and thus avoid CO2 poisoning. This allows them to stay submerged for long periods of time, which helped many species to survive the K-T Event. Also Crocs are the last living Archosaurs, who preceded Dinosaurs. If you look at what their species was like during the Cretaceous, you can see how utterly scary they were back then, and how much hardier they were back then, in addition to being gigantic. Also, all species, including mammals and amphibians, suffered tremendously (~70-75% of all species died out during this event). However, our genera are not gigantic and don't need mega flora to feed us, thus the world no long suited dinosaurs.. Also, there was probably an abundance of dead dinosaur to eat for a long time, so the scavengers, like mammals, definitely made it big for a while.

Haha, yeah. Higher oxygen content, thicker atmosphere, arthropod gigantism. Though not nearly as scary as the pre-Permian event (insects & etc) where I've seen fossils of 6 foot long scorpions and dragonflies with 4 foot wing spans. Every extinction event has made more advanced life possible. Now we probably have the means to stop an asteroid event. Its almost like evolution produced a species to do this as it got tired of rebuilding every 60 million years or so. Like a natural step in evolution.