I am intrigued by this:
GEN 2:19 And out of the ground the LORD God formed every beast of the field, and every fowl of the air; and brought them unto Adam to see what he would call them: and whatsoever Adam called every living creature, that was the name thereof.
A quick search at the national geographic showed:
To date, taxonomists have identified less than two million distinct species, mostly mammals and birds. But it's estimated that the number of undiscovered species—primarily fish, fungi, insects, and microbes—ranges from ten million to more than one hundred million. Even at the low estimate, it's an enormous number.
I'm wondering how long was it before Adam was done?
Assuming there are just 2 million species and that Adam took just one second to name each one it would take...
2,000,000 seconds / 60 = 33333 minutes / 60 = 555 hours / 24 = 23 days. Not bad going. However, if the 100 million estimate is more accurate it would take 1150 days or 3 years and a month or two. Quite a feat of endurance!