Other Worlds #2: Astrobiology Primer

[@samuellima6193]

3:24 Ironically, carbon created life as we know, but is now killing a lot of life as well

[@violetlight1548]

I propose a new term for the study of life on Earth - Geobiology! To differentiate it from Astrobiology (life from "the stars", or more generally, not Earth), of course. Anyway, great introduction to this very interesting theoretical (for now) science! I look forward to seeing more in this series!

[@petersmythe6462]

There's four things life near universally needs: 1. Useable energy sources either in the form of reactive, edible chemistry or energetic radiation that can trigger a pigment. Theoretically mechanical or thermal energy sources are possible but this is extremely rare in practice. Probably because evolving a pathway to convert, say, changes in water pressure from waves and tides into highly energetic chemistry is not trivial. Though I would love to be proven wrong with an example of organisms substituting photosynthesis for thermosynthesis, barosynthesis, or anemosynthesis. 2. Organic Nutrients available to be eaten in the environment. They need to be of the correct elemental composition to build the complex biomolecules needed. 3. Liquid Water (at least it should be that way inside the organism. Elevated body temperatures or antifreeze taken into account). Other solvents might work but it requires radically different biochemistry. 4. Internal or external protection from sterilizing radiation and chemistry. Most life-deficient environments tend to lack one or more of these things. And the minimization of any of them is sufficient to prevent life from dominating an area. Deserts lack water. Ice sheets lack nutrients and liquid water. Polar environments lack energy sources for months at a time. The south pole has all four problems now that humans have opened it up to sterilizing radiation from the sun. Which is probably why little if anything lives there on a long term basis.

[@mechamudskipper]

"Teh aliengs are attacking Urf. Go fight!"

[@tequestaorangejuice6673]

Dont forget, there is another large celestial body in our goldilocks zone: the Moon!

[@TheAstrobiologistOW]

I HAVE BEEN SUMMONED Anyways what's up?

[@Dedicatedfollower467]

You always make such great videos when it comes to astrobiology and life and other planets. This is a really great video!

[@LordZero666]

Awesome video like always ! I have recommended the channel to some of my friends to help them enter the world of spectulative biology !

[@arcanehighlighter6780]

Fantastic!

[@xhtml5for1.0]

190+ Living Species in Sun solar system + Mens

[@thumper8684]

The ancient Romans did use oil for washing. I don't know why except that they did not have soap.

[@richardcrosby6682]

Your playlist is out of order.

[@Carmenifold]

god i hope we find life out there soon

[@danielgrizzlus3950]

excited for this series :)

[@theqracken4035]

Excellent!

[@niallkaynen5885]

E

[@the_chosen_one5642]

ALGORITH LETS GO

[@benmcreynolds8581]

I can't help but wonder if black holes can act like "great recycling machines" in the universe, that transfer matter, (not how it was, but converted gas/dust/atomic molecular make up building blocks gas clouds type substance) Maybe something like that is what we consider a "big bang type event?" Or black holes could recycle into other far regions of our own universe that is beyond our reach of observation due to the limitations of the speed of light constrictons OR possibly black holes share matter to regions that are considered another universe? I've always enjoyed hypothesizing the analogy of "Bubble's of Oil in Water- or water droplets on a spiderweb" where each bubble is it's own universe, that can interact/bump into each other, have black holes connect from 1 to another. Maybe each universe is randomly generated to certain laws of it's physics. Some stable, some not. That's just how I like to enjoy it. Or it could just be this one universe, is it just this one growing evolving changing universe? Could black holes, neutron stars, pulsars, quasars, super nova's, have enough power in certain aspects of physics, that they do things we have yet to comprehend what comes from those immense energy output's of electromagnetic fields, Gravity Wells, concentrated radiation, gamma rays, pressures, temperatures and temperature differences, friction, static charges, velocity's, density's on scales we can't even remotely comprehend even in our best super computers. I'm just messing around with ideas. Im in no way saying I know anything. What I do know is nature never ceases to amaze me. So I will not be surprised to get further surprised at what we continue to learn about this spacious void we live in that has vast amounts of something, even in those voids of space that we thought contained nothing. It's all just facinating, Nature has this way of surpassing my imaginations creativity. It always finds a way to convert things in order to not waste things. Everytime I dive into the micro world, or zoom out and observe the greater manner a specific ecosystem functions, I'm continuously finding myself surprised at how Nature functions, the depth to the complexity is endless, no matter how far you zoom in or zoom out, it's filled with immense detail and beauty, it really is. ♻️🌲🍂🪵🍄🌱🌹🥀♻️