Cosmobiology: Recent Progress in Cosmology
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- Опубліковано 26 кві 2022
- Cosmobiology: Recent Progress in Cosmology, Exoplanets, and the Prerequisites for Life in the Universe
Dr. Charles Lineweaver (Australian National University)
April 27, 2022
In this talk, astrobiologist Charles Lineweaver discusses the history of life on Earth and what we can deduce from our understanding of the universe about the existence and history of life elsewhere. He recounts the ongoing discovery of large numbers of exoplanets -- planets orbiting other stars -- and what we can learn from the varieties of planets that are being found. He challenges us to think about what parts in the development of intelligent life on Earth would necessarily happen elsewhere and what parts might be unique to our planet. - Наука та технологія
The speaker's main point is profound: we should be looking at our relationship to other taxa on earth as a model for thinking about our relationship to other taxa in the universe. Wonderful talk!
I am very grateful to be able to follow lectures like this. Thank you guys
What an amazing lecture. Love the energy of the lecturers in these series.
Interesting and thought provoking. Thank you Dr. Lineweaver.
Very interesting lecture. I really enjoyed it! I never even thought about heads being quirky, but I get it. I'm a strong believer in life on other planets, I don't believe it will be anything like life on earth. We could be seeing life on Mars right now and not recognizing it.
Sending Love ❤️...Tracy...Are you single? 😊❤️
fantastic
Life == intentful Effect/affect by a system.
Maybe Dr Lineweaver is a polymath? I study Vedic Astrology and am interested in Fixed Stars. My uncle Dr Bashir Mallal had a doctorate of laws from National Singapore University.
Captivating and informing talk Dr Lineweaver! I have one question. How can you say that “as we are not alone on earth, we can’t be alone in the universe”. Why not?
In that sentence, the "we" is "we humans". Since we humans are not alone on Earth, we can't be alone in the universe because the Earth is part of the universe.
@@arewealone8944 ok that makes sense. Isn’t it also empirical to say that earth COULD be the only place lift exists in the whole universe?
@@chimbrazo5435 So far , sure. But the universe is inanely big and theres such a mindbogglingly large number of planets with the right conditions for life, that all it takes is one lucky chemical reaction and you got life. And thanks to quantum mechanics stirring up the unpredictability pot, its likely those lucky reactions occur a whole lot.
Because earth is part of the universe.
assuming some form of macro-life is discovered out there, be it flora or fauna, I propose a question perhaps as old as humanity itself. can I eat it? obviously it cannot be answered definitively until found, but I'm curious if any assumptions might be made. must the consumed be of common ancestry? after-all, does not everything we are capable of safely ingesting (and extracting energy from) have with us a common ancestor?
Dark matter and dark energy aren’t needed when you understand that rate of time and the measure of distance are relative to the amount of matter in the vicinity. The speed of light literally depends on these variables of time and distance. As you observe a galaxy you are seeing differing rates of time and differing measures of distance. The result is that you are actually seeing differing speeds of light relative to where we are since the measures of time and distance are dependent on the amount of matter and gravity there is in the vicinity. (The speed of light isn’t actually changing, the measures of time and distance are changing *which effectively changes the speed of light as we observe it over great distances.)*
The result is that distance is greatly expanded (not expanding) where there is no matter between us and distant galaxies (causing redshift) eliminating the need for dark energy and the movement of the outer spiral arms of galaxies is at a faster rate of time causing them to move faster as we observe them eliminating the need for dark matter. This also means that plasma jets shooting out from the center of galaxies isn’t seven times the speed of light. It’s that the distance is expanded and the rate of time is faster the less matter there is in the vicinity.
There is no such thing as a nonsensical infinitely expanding universe and there is no such thing as imaginary invisible dark matter.
Can anyone give me a timestamp for the life on a neutron star comment? Thanks
Checkmate
I’ll take you one even further: consciousness: catalysis of the environment into Electric chemical action permeability generating stasis. often extensions of life (intentful effect). Stasis -> differential geometry of the environment into an equilibrating system.
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I don't understand why heads are so rare? Almost any animal life form we see insects, fish, birds, mammals have heads. I understand plants don't have heads and microbes, and a lot of pre-historic life forms before plants, but why heads is rare? The speaker assumes this is self evident but it's not.
Also usually when it is asked "are we alone?" it is meant is there an intelligent (yes human-like intelligence) life form anywhere other than earth, almost always (that is how Fermi paradox is defined). It does not mean something in human form, but it is meant to be an intelligent life form, not a virus, no matter if virus is alive or dead or undefined! We also don't mean a hurricane or storm.