Has JWST found potential alien worlds? Neil deGrasse Tyson and comedian Matt Kirshen learn about exoplanet discovery on the frontier, how higher oxygen gave us dinosaurs, and what type of life could evolve on alien worlds with astrophysicist and astrobiologist Lisa Kaltenegger.

Lisa tells us about breaking down the chemical signature of newfound rocky planets. When will we have telescopes that will see the surface of these exoplanets? If an alien on a different planet pointed a telescope at us, what signs of life would they see? Is there anything they could mistake us for? We explore how geology creates complicated atmospheres and of course the question: what is life?

Could life have landed here on a meteorite and blended in with other life on Earth? We discuss the universality of biology: do the rules of biology apply everywhere? How hard is life to get rid of once it’s started? How fast could life evolve on another world? Plus, learn how Earth’s oxygen levels contributed to the Jurassic period. We explore extremophiles and whether life could live on asteroids, icy moons, and large rocky planets: Super-Earths. What conditions trigger complex life?

Did human life come from panspermia? Find out about chirality and why we think that all Earth life started from the same source. Why do people really want to think we came from space? We talk about dimethyl sulfur as a biomarker and why its discovery on a Super-Earth may be both promising and potentially misleading. Can we figure out if we are alone or not?

Timestamps:
00:00 – Introduction: Lisa Kaltenegger
4:10 – Hunting Alien Earths
12:05 – What Would Aliens See If They Looked at Us?
18:13 – Is Every Animal on Earth From Earth?
23:03 – How Fast Could Evolution Go?
27:03 – Could Life Exist Outside of Planets?
32:36 – Life on a Super-Earth
38:04 – The Panspermia Question
41:44 – Biomarkers & Dymethyl Sulfide
47:40 – A Cosmic Perspective

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Comments

  • @StarTalk
    Reply

    What year do you think we'll finally discover extraterrestrial life? 👽 We'll check back here when it happens to see who guessed right!

  • @myronwilliams3340
    Reply

    She probably explained it in her answer if we are mostly looking for life on earth like planets couldnt an animal from earthlike planet have similar dna

  • @TroyCanDance
    Reply

    My first planetarium visit was as to the Hayden. With the enormous projector overhead. It was so exciting. The Natural History Museum was my fave. Dinosaurs, stuffed animals, giant minerals and mummies!!!!!

  • @jononeill1000
    Reply

    Question ❓ if now if the dinosaurs didn't die off via meteorite causing their extinction, would human beings be on this earth, or a type of humans.

  • @emosam07
    Reply

    Thats a last name id def be changing lol

  • @thezetes
    Reply

    I have watched countless hours of StarTalk. I am a life time fan and active member on your facebook page, just to found out I was not subscribed!

    So, well, subscribed! 😅

  • @notthere83
    Reply

    Getting a US citizenship NOW? 😮
    I wonder how often he gets asked why. At least by non-Americans.

  • @samanthabirthdays
    Reply

    how is it that the great white shark and the orca can travel from one ocean into the next ocean through the dividing lines of the water when the oceans do not mix with each others dimension…

  • @notthere83
    Reply

    Using different terms to obscure the fact that you are in fact talking about THAT thing that everybody knows is one of the most ridiculous things humans do and that in my opinion especially in science communication shouldn't be done.

  • @jawdropperfinds
    Reply

    It's thrilling to think about what we might find out there.

  • @emifuc1211
    Reply

    Lisa is an amazing communicator

  • @oJaeRoc
    Reply

    You should have Tereance Howard on to answer some Cosmic Queries!!

  • @HarryNicNicholas
    Reply

    i like musk, i like starhip, but i wonder, his ships are built in the open air (more or less) if they are going to land on mars will they depend on re-entry burn to decontaminate them? i haven't heard anything about this?

  • @Just1morehour
    Reply

    Sounds like they are looking for “earth” life and not “other” life. I just don’t believe there will be other “earthlings” out there…there would have to be a planet that’s exactly the same as ours. Whatever life or existence that’s out there would be evolved to its specific habitat.

  • @epicon6
    Reply

    Where’s the black comedian?

  • @jerelsalazar7959
    Reply

    What!?! Did i heae that right

  • @polacosan
    Reply

    Loved this lady.

  • @HarryNicNicholas
    Reply

    In the year 2525, if man is still alive
    If woman can survive, they may find
    In the year 3535
    Ain't gonna need to tell the truth, tell no lie
    Everything you think, do and say
    Is in the pill you took today
    In the year 4545
    You ain't gonna need your teeth, won't need your eyes
    You won't find a thing to chew
    Nobody's gonna look at you
    In the year 5555
    Your arms hangin' limp at your sides
    Your legs got nothin' to do
    Some machine's doin' that for you
    In the year 6565
    You won't need no husband, won't need no wife
    You'll pick your son, pick your daughter too
    From the bottom of a long glass tube

  • @jurgenporn1867
    Reply

    Neill's voice is a great asset when it comes to storytelling, But Ms. Kalteggers matches just the same bar. Both should be hired by audible or made the machines avatar.

  • @HarryNicNicholas
    Reply

    you missed the obvious, the statue of liberty would still be french.

  • @arghsonofcliff
    Reply

    With the diversity of life on this planet I believe life is just another element in the universe. And it is probably everywhere.

  • @NexusGamingRadical
    Reply

    Any other software devs look at JWST and think… JSON Web Space Token?

  • @bullbearjeff
    Reply

    She's one of the best star talk guests ever

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