Armchair Science with Ian: Smokey roasted flavors and ecology

Watson or Crick (of DNA fame, I believe it was Watson but won't look it up right now) was known to be an armchair scientist--he postulated ideas, made a few theories, wrote them down, and eventually others began to prove them empirically (even many decades later) without him having done any of the legwork for which the scientific community was known to hold in high esteem (and still does).

Culinary science questions come to mind frequently enough that I begin to answer them myself, and the answers are so sensible and sound to me that I'm almost convinced that I could pose them seriously to other people. Keep in mind that I'd be happy to write well researched essays about these questions. However, there are three issues:
1) I rarely have time to sit in an armchair, especially since I often commute between cities.
2) As a student, it's very likely that I'm already writing essays about something else for the certification of my educational degree. It's also very likely that those essays concern science, and require research to back up what I say to my professors and/or peers.
3) I've forgotten what the third issue was in the first place leaving me feeling even more exposed to academic criticism!

So I'll pose musings of varying length to whomever wishes to read here--without doing the detailed research...for now. But I have to admit that I do find some satisfaction in learning whether or not these ideas are true or at least partially correct, so someone please let me know.

Here's my most recent idea, with a story as backdrop to how it came forth:
Smokey Roasted Flavors and Prairie Ecology

wild carrot (Daucus carota) comes from Europe, likely escaped from someone's garden or field after being introduced into the U.S., and is commonly found in open spaces like prairies and fields. Keep an eye out for it around May if you're anywhere in Northeast United States.

At this time of year, most of these plants have finished with their flowers and gone to seed. The seeds are small, it quickly spreads, and appears intimidating to weed out when it gets really tall during the summer (especially because it attracts so many potentially upsettable Hymenopterae--insects like wasps, bees, and ants). At this time, most of the wild carrot has dried up and today I pulled lots of it out of my parents' vegetable garden (it had successfully dominated 1/3 of this garden), piled it up, and decided it would be reasonable to burn with the intention of scattering the ashes over the garden to help recharge the soil of its nutrients. Even though it dry and burned in a controlled space, I was still surprised that the wild carrot caught fire so quickly.

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I later went inside to have a chicken soup, and added mesquite smoke. Somehow, we have neurons devoted to the pungent aroma and, important to this discussion, flavor of smoke. Some things taste better with the right amount of smoke. Why though? This brings us to the age old question of how and why we humans came to cook our food.

The earliest humans or their ancestors likely lived in African savanna habitat--prairies (mostly grass with a few trees scattered here and there).

I recall that many early peoples and even current day people will intentionally burn grasslands every few years (though perhaps for differing reasons now).

I think the first hominids to eat cooked food didn't cook their own food--it (wildebeest, whatever) was simply in a burning grassy area during a fire.

When did they start hunting? Is it more likely that they learned to use fires as traps? Or is it simpler to catch the meal and then cook?

Possibly later, humans learned to use fire for agricultural purposes, but for those who benefited from recognizing burned things by smell and the taste, perhaps there was something substantial to it. We can reason that cooking can sterilize foods, and by not getting sick from what you eat, you have the opportunity to live longer and proliferate future generations. Over millions of years (sorry, the archaeological clock in my mind is probably way off--I forget the evolutionary timeframe of human beings at the moment), inborn into most folks who could detect these scents and flavors had developed some liking to them. Perhaps because they were 1) good at detecting fires and could get away, survive, etc. 2) more likely to eat things that were almost guaranteed to be sterile and therefore capable of surviving and reproducing.


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...Lessons learned from not completing this post: Write what's logical first, then give the story. Otherwise, you could lose both! Now that I'm revisiting this post, I think I've covered what I wanted to say, but I frankly don't remember if I captured the story telling and arguments I wanted to put forth as well as I had once planned.