Re: 99% of species are extinct
Evolutioniary biology is one of the most interesting subjects I've studied. Jump right in to the Cambrian animal fiesta if you want total immersion. There's not enough evidence for any specific theory and there's more than enough grant money for most any idea. More phyla came and went in this scant 15 million years than in any other*. Google 'Burgess shale' and jump right in, it's quite a tale.
* InTheDark is not now and has never been a paleontologist.
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