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Cool. Yes, Earth is an evolved planet. Life changed it dramatically.
Iron - in hemoglobin. Iron is reddish.
https://www.youtube.com/watch?v=aJCNx3_jj1A
This new UI is driving me nuts!!!
So what I was typing before it caused all kinds of havoc was that the Earth is more unique than the general public would ever know.
Without life altering the planet itself many minerals and even gemstones could not form. People commonly confuse elements and compounds.
The introduction of them can have global effects.
Another example was how photosynthesis released vast amounts of oxygen into the atmosphere. Without that process it would be much more difficult for a planet to form an oxygen rich atmosphere.
Therefore, assuming that we ever actually set foot on an exoplanet- such as Mars, the very behavior and personalities of other planets are going to be vastly different without life's alterations.
Agree on the UI. This upgrade is a downgrade.
By the way, Irene mentioned the color of blood. Check out the crazy similarity between the chlorophyll molecule and hemoglobin molecule. They look the same - except the chlorophyll molecule has a magnesium ionic bond at the center and hemoglobin molecule has an iron ionic bond. Also consider the ionic bond is bounded by all covalent bonds. Gotta trap it.
Atmospheric oxygen is highly reactive. Fire? Oxygen respiration? The oxygen would dissappear from the atmosphere in 2 million years if it wasn't replaced by life.
Also, check out the chemical equations for photosynthesis vs cellular respiration. One's product is the others input. It's like a balanced wheel rolling through time. Very important.
Yup, we won't find an inhabitable planet if life doesn't already exist there. We need an evolved planet.
I would not have known about those molecular similarities. I gotta go look at that some more!
Plus I should dive a little deeper into photosynthesis vs cellular respiration.
Bonus point:
The closest concept that I knew related to those is hormones are not random. Bodies produce them and they branch out like a tree.
Therefore, hormones such as testosterone and estrogen are almost identical. One would have to closely look models of them to see the difference.
This is how the body can relatively easily change one hormone into others. They weren't that far apart to begin with.
The only thing that I need to get to heaven is a long ladder and a well built woman.
Photosynthesis vs cellular respiration has got to be the most amazingly balanced equation for life through time. Photosynthesis and oxygen respiration are completely balanced. Add water, carbon dioxide, and energy and you get water, oxygen, and glucose. Add water, oxygen and glucose and you get water, carbon dioxide, and energy. Like a balanced wheel rolling through time. It stabilizes the atmosphere for sure. Exponential growth in a finite system is no bueno. We need balance.
Also check out lateral gene transfer in prokaryotes. This ability allows them to adapt quickly - almost like in real-time on a geological scale. And given a food source, they can multiply very quickly. These are valuable strategies for single-cell life.
Did you know it was only around 500 million years ago that there was enough oxygen in the atmosphere to create a fire?
It's interesting to consider the evolution of life - because you should if you want to know why the sky is now blue.