Astrobiology: The Search for Extraterrestrial Life

How many movies have you seen about aliens? Are any of them realistic? Does intelligent life exist elsewhere in the universe or are we totally alone? Both options are rather terrifying, frankly. But there are scientists that spend their days looking for places where life might be, and speculating as to what it might be like. It's the field of astrobiology, and it's out of this world!
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Σχόλια 

  1. richtalk34

    richtalk34

    Πριν 3 ημέρες

    Considering the eons involved, we've only been looking for a time equivalent to the blink of an eye. Surely far too early to say Where are they?

    • Professor Dave Explains

      Professor Dave Explains

      Πριν 3 ημέρες

      Well but if they were broadcasting continuously, we should hear them immediately, provided that we are pointing in the right direction. Maybe they're not broadcasting, or maybe we haven't found the right direction, or maybe no one is there. Who knows!

  2. Ishtiaq Zaman

    Ishtiaq Zaman

    Πριν μήνα

    Every time when say that "we are alone", I lose hope. Please don,t say that.

  3. LordJaric

    LordJaric

    Πριν 2 μήνες

    And now Venus is being considered for the possibility of having life. One thing I disagree with Neil Tyson on is that an advance civilization wouldn't even considered looking our way. As an anthropologist studying other cultures and understanding them is fascinating, whos to say an advance alien civilization would want to do this this with other civilizations. Now I'm not saying that we are being visited by aliens, just saying that we would be completely ignored is kind of silly.

  4. Kim Larsson

    Kim Larsson

    Πριν 2 μήνες

    The list of things that aliens and humanity possibly share, is not weird, and the possible similarities between our lifestyle and alien lifestyle are fascinating. Many lightyears away, there's probably cars, electricity, fuel, wheels, ships, fires, machines, factorys etc. The natural laws are the same everywhere, and the basic elements to. I presume there are "humans" out there...

  5. lj.boulard

    lj.boulard

    Πριν 3 μήνες

    it's too far. let's be realistic. technology has limits. for us and for them. it's the same. they are just like us.

  6. Mahesh Zarkar

    Mahesh Zarkar

    Πριν 4 μήνες

    Akram movies:0

  7. Ender Texter

    Ender Texter

    Πριν 4 μήνες

    aliens might not contact us because how annoying we are always sending signals into space like that one cousin that always annoys You Because we are *THAT* planet

  8. Halo 3

    Halo 3

    Πριν 4 μήνες

    Do you think scientists will ever find intelligent life on Earth?

    • Vlad CCC

      Vlad CCC

      Πριν 4 μήνες

      Yeah, everyone on Earth who is not alt-right is intelligent by default

    • Jake Johnson

      Jake Johnson

      Πριν 4 μήνες

      As buzz lightyear says “there is no sign of intelligent life”

  9. Joel Koori

    Joel Koori

    Πριν 5 μήνες

    What's the point of the whole universe if we were to occupy only Earth alone? This tells you we're not alone

  10. Tony Productions

    Tony Productions

    Πριν 5 μήνες

    I enjoyed how you pointed out that planets didn't necessarily need to be in the habitable zone for life, just life as we know it.

    • Tony Productions

      Tony Productions

      Πριν 5 μήνες

      @Professor Dave Explains That would be cool!

    • Professor Dave Explains

      Professor Dave Explains

      Πριν 5 μήνες

      Even life as we know it doesn't need to be in the habitable zone! There could be life on Europa, for example.

  11. Tymbus

    Tymbus

    Πριν 5 μήνες

    I am sure that thee is alien life out there in the Universe, but distance means tha we are in effect alone.

  12. Eko Jar

    Eko Jar

    Πριν 5 μήνες

    I bet there is an earthlike planet somewhere in some galaxy that created organic life and as soon as life was created it was struck by a stray lightning bolt and died in an instant haha. The odds are high but it may have happened

  13. Palitha Hettigoda

    Palitha Hettigoda

    Πριν 5 μήνες

    To be honest, I wont be suprised if a planet we have been observing ends up having microscopic life on it, we just can't tell how likely it is for life to develop in a stable environment, It is intelligent life that is much more unlikely

  14. DoctorHver

    DoctorHver

    Πριν 5 μήνες

    “If it’s true that our species is alone in the universe, then I’d have to say the universe aimed rather low and settled for very little.” ― George Carlin, Napalm & Silly Putty

  15. Marco Borş

    Marco Borş

    Πριν 6 μήνες

    Brilliant...Thorough a.f... got 3 minutes in, heard about the "liquid water is a must"... I was like:"Heyyyyy... What about extremophiles?"... Next sentence Dave smacks the bejessus out of me by answering... Love it, would like to pick your brain sometimes on abiogenesis... I'm thinking on writing a paper on it... Something on the lines of "molecular modelling of the road from inorganic to organic"(crappy title for now) for a convention... As soon as this whole mess passes...

  16. nick hanson

    nick hanson

    Πριν 6 μήνες

    Excellent video Dave. As usual a big subject well covered

  17. AGRACUTA

    AGRACUTA

    Πριν 6 μήνες

    flat earthers and pandemic protestors are gonna hold us all back from progress im afraid.

    • event3horizon

      event3horizon

      Πριν 4 μήνες

      you forgot antifa-blm

  18. annabloom riverrun

    annabloom riverrun

    Πριν 6 μήνες

    The vast distances invovled might be disencouraging. If a civilisation manages to develop a drive capable of reaching 99.9999% of c, it would still take several years to reach the next solar system (unless they manage to create something like the Alcubierre drive). Due to time dilation they would also leave their home planet in the knowledge that many more years will have passed once they return, their friends and family dead and they themselves the topic of stories that happened in a distant past. The civilisation might then be content to explore its own system and not go further.

  19. Damian Freeman

    Damian Freeman

    Πριν 7 μήνες

    Another possibility is the idea that if another intelligent civilization existed, it may simply have gone extinct by one of various means. And the sad thing there is that depending on its distance, we could very well receive a signal, go to investigate, only to find a completely lifeless planet. Or worse, we basically discover Borg.

  20. Joseph Keenan

    Joseph Keenan

    Πριν 7 μήνες

    A lot of the Drake Equations don't take into account the amount of time the stars weren't cranking out the right stuff..... there needed to be the "right stuff" in the dust clouds to for the basic amino acids needed for abiogenesis. Will leave the whole RNA, panspermia, deep ocean vents, ect for another time. The ingredients to form the stuff just wasn't around for a few billion years in the early universe.... The other problem with "contact" is having the intelligence arise in the same neighborhood at the same time to be detected by either species. Ice shell worlds present another issue. There might be intelligence but without fire could they ever develop technology? Would the "upside" ever be more than a shell? What would anyone swimming up through the km of ice know what the stars mean? Not doubting the intelligence but without them having any context of what it all might mean.

    • Joseph Keenan

      Joseph Keenan

      Πριν 4 μήνες

      @Rayven Hitt you not need to look far for aquatic life. When I was in high school (30 years ago) they were just starting to formulate hypothesis about life starting from deep sea vents (instead of tidal pools). We've got a few moons in our own solar system that COULD harbor life. Ice shells present a slew of problems mentioned above. Like you said I'd be happy with bacteria or an analog to it. We need to have a abiogenesis and evolution pool that is bigger than just a single planet :).

    • Rayven Hitt

      Rayven Hitt

      Πριν 6 μήνες

      Excellent insight. To be honest, I don't care if we find intelligent life anytime soon. Finding an actual Earth-like planet, with simpler creatures (insects, molluscs, cnidaria, fungi)? Good enough for me.

  21. Michael Dlugosch

    Michael Dlugosch

    Πριν 7 μήνες

    Maybe they are communicating to us using radiation based on dark energy. We simply may be searching for the wrong set of radiation to detect. Or they are so intelligent that they decided it's better to leave us alone, since some of us are still stuck in the "flat earth" stage.

  22. Isuru Priyaranga

    Isuru Priyaranga

    Πριν 7 μήνες

    I watched this last year and now, I am watching it again. Still feel so great! Thanks, professor!

  23. Anmol Malkute

    Anmol Malkute

    Πριν 8 μήνες

    🚀🛰🛰🛰🛰🛰🛰

  24. Ketan Singh

    Ketan Singh

    Πριν 9 μήνες

    There's also the rare earth hypothesis

  25. ahcapella

    ahcapella

    Πριν 9 μήνες

    Dave, it isn’t necessarily the case that these advanced beings are retreating into virtual worlds (9:08). Perhaps, once an intelligent civilization perfects the technology required to build thoroughly lifelike sex robots, it loses all interest in interacting with other life forms that may exist in the universe. But seriously, I’ll be VERY interested when the day finally comes that we get a probe down to the subsurface ocean of Enceladus and/or Europa to take a look around!

  26. tuskeyl

    tuskeyl

    Πριν χρόνο

    still we don't know how life began, that's the big question

    • Professor Dave Explains

      Professor Dave Explains

      Πριν χρόνο

      definitely. i hope i'm alive for it!

    • tuskeyl

      tuskeyl

      Πριν χρόνο

      @Professor Dave Explains a very special feeling it will be when we find ET life

    • Professor Dave Explains

      Professor Dave Explains

      Πριν χρόνο

      My point is that it absolutely can be explained, and we do a pretty good job at explaining it. Saying that life is "special" is not really a meaningful statement. Anything is special in a certain context. And even life is utterly trivial in another context.

    • tuskeyl

      tuskeyl

      Πριν χρόνο

      @Professor Dave Explains thanks Dave. That's what makes life special , we can't explain it

    • Professor Dave Explains

      Professor Dave Explains

      Πριν χρόνο

      check out my biology tutorial on the origin of life. we have some very solid hypotheses.

  27. Capt'Wes Starwind

    Capt'Wes Starwind

    Πριν χρόνο

    It's that L that can be troubling.

  28. Gangsta0wns456

    Gangsta0wns456

    Πριν χρόνο

    Great video Dave! I’m minoring in this fascinating area of study and I’m excited to learn more!

  29. The Singularity is Near

    The Singularity is Near

    Πριν χρόνο

    Or maybe life is right infront of us but we can't recognize it.

    • Rebel Friend

      Rebel Friend

      Πριν χρόνο

      Kelp Squid in another dimension

  30. Donnie Russell II

    Donnie Russell II

    Πριν χρόνο

    Maybe the immense distance between stars and galaxies is part of the secret of life, by keeping energetic/destructive events far away, as well as other civilizations bent on conquest (as we humans have demonstrated on a smaller scale).

    • Professor Dave Explains

      Professor Dave Explains

      Πριν χρόνο

      not a bad way of looking at it!

  31. Shaini Ayodya

    Shaini Ayodya

    Πριν χρόνο

    Thank you so much for this professor!

    • You can't get Me

      You can't get Me

      Πριν 5 μήνες

      @Ninters Then why is he juding the Girl ?

    • You can't get Me

      You can't get Me

      Πριν 6 μήνες

      @BLVGaming / Y1000 because that's all what you see and always think about

    • BLVGaming / Y1000

      BLVGaming / Y1000

      Πριν 6 μήνες

      Sounds like an end of a porn vid.

  32. sniperammow

    sniperammow

    Πριν χρόνο

    0:47 well i would not say intelligent.

    • Dragoon GT

      Dragoon GT

      Πριν 5 μήνες

      Ninters it was an obvious joke

    • Dragoon GT

      Dragoon GT

      Πριν 6 μήνες

      @Darth Jar Jar Binks The real Sith lord no, we're talking about your spelling

    • Darth Jar Jar Binks The real Sith lord

      Darth Jar Jar Binks The real Sith lord

      Πριν 7 μήνες

      Taking abuot flat-earthers?

    • H1N1

      H1N1

      Πριν χρόνο

      😂

  33. Rujesh Shah

    Rujesh Shah

    Πριν χρόνο

    Hey I have extreme doubt that why people search life only in physical form they can search it with bioplasmic imaging?

  34. Sudarshan Rathi

    Sudarshan Rathi

    Πριν χρόνο

    touched my heart

  35. Nabarup Ghosh

    Nabarup Ghosh

    Πριν χρόνο

    You are EPIC

  36. CJ CREATIONS

    CJ CREATIONS

    Πριν χρόνο

    How did you know all of these

  37. Rifka A.Y.

    Rifka A.Y.

    Πριν χρόνο

    been doing tasks today and this video's dropped like a reward from God. watching it in my bedtime now. i've always been interested in astrobiology! thank you very much for this!

  38. MANIYAN PILLAI

    MANIYAN PILLAI

    Πριν χρόνο

    Super

  39. Mahesh Kandgule

    Mahesh Kandgule

    Πριν χρόνο

    Thanks

  40. H1N1

    H1N1

    Πριν χρόνο

    1:16 you literally bashed the Bible bashers with logic

    • sniperammow

      sniperammow

      Πριν χρόνο

      lol!

  41. Kevin Moore

    Kevin Moore

    Πριν χρόνο

    Good video. Liked, and favorited.

  42. Chadar

    Chadar

    Πριν χρόνο

    Pin this if you love your subscribers!

  43. H1N1

    H1N1

    Πριν χρόνο

    You are an amazing human! This video was epic, may nature bless you

  44. Prabesh Timilsina

    Prabesh Timilsina

    Πριν χρόνο

    Hi

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