CAM photosynthesis is a clever adaptation some plants have where they turn light into sugar during the day, and only breathe in CO2 at night. This lets the plant close up its leaves so they don't lose water during the heat of the day.
CAM plants use sunlight to turn malic acid into sugar, and every night they breathe in plenty of carbon dioxide, storing it as a fresh supply of malic acid. If you have keen senses, you may be able to taste the difference between a CAM plant harvested during the day and one harvested at night because of this variation in sugar and acid content.
Having evolved several times independantly, you see CAM in lots of different kinds of plants: air plants and bromeliads, which have poorly developed root systems; cacti and other succulents, which grow in hot dry environments; you even see it in some aquatic plants. For these, CAM serves not to conserve water, but carbon dioxide - which is of course hard to come by when you don't have any air.
The "crassulacean" part of the name "crassulacean acid metabolism" is there because this phenomenon was first discovered in crassulas. Jade plants are an example of this genus.
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Time is an illusion, all forms are ephemeral and life is like a dream that ends too quickly. The only meaning you can find is that within yourself, and the only ambition worth struggling for is the pursuit of eternal life/nirvana (in one way or another, transcendence from the limited forms of an illusionary world)
^ the above is the philosophy behind a lot of eastern religions. At least, that's what I can gather.
As far as I can tell, even Christianity has an element of this (immortal soul, heaven).
Kind of interesting that a lot of feudal era religions came to this idea, while post-fuedal religions went full "I love !" mode.
Then Mahayana comes, flips it upside down, and says the real goal is to put off your own personal nirvsna until all uncountably infinite beings are also liberated. The process of staying here and liberating all beings sorta becomes nirvana itself. And the arahats are bodhisattvas too even if they don't realize it.
Row row row your boat,
Gently down the stream,
Merrily, merrily, merrily, merrily,
Life is but a dream~
Life is but a nightmare
Edit: OK it's not that bad
I do wonder how much Christianity got influenced by Buddhist thought. Ecclesiastes is like a super Buddhist book in the old testament, it sits out like a sore thumb, its like the pragnaparamita except they tacked some stuff on on the ends what seems to be entirely after it existed. There was some mixing in the area in like 300 BC between Ashoka and Alexander, so maybe - and maybe there was some leftover until 300 AD.
Yes, there was definitely way more mixing between east and West than most people think. Not sure it's from Alexander and Ashoka's interactions. Maybe from silk road exchanges in general.