How Old Are You? Well, Your Liver Is 3

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This week, a group of researchers use nuclear fallout to figure out how old liver cells are, while another gets one step closer to predicting volcanic eruptions.

Hosted by: Hank Green

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Sources:
https://www.eurekalert.org/news-releases/954346
https://doi.org/10.1016/j.cels.2022.05.001

https://www.eurekalert.org/news-releases/954654
https://www.science.org/doi/10.1126/sciadv.abm4261

Image Source:
https://www.gettyimages.com/detail/photo/realistic-human-liver-illustration-royalty-free-image/475964404
https://www.gettyimages.com/detail/video/red-cape-waving-stock-footage/487103570
https://els-jbs-prod-cdn.jbs.elsevierhealth.com/cms/attachment/628dd251-f626-4784-ab35-03fbe3349cd6/fx1.jpg
https://www.gettyimages.com/detail/photo/hepatocytes-0-5-micrometre-plastic-section-royalty-free-image/1358577608?adppopup=true
https://www.gettyimages.com/detail/photo/human-liver-hepatocytes-royalty-free-image/860040064?adppopup=true
https://www.gettyimages.com/detail/illustration/isotopes-of-carbon-3d-vector-illustration-royalty-free-illustration/1360655261?adppopup=true


https://www.gettyimages.com/detail/photo/high-scale-magnification-of-liver-cells-royalty-free-image/923925782?adppopup=true
https://www.gettyimages.com/detail/photo/high-scale-magnification-of-liver-cells-royalty-free-image/923927120?adppopup=true
https://www.gettyimages.com/detail/photo/skin-royalty-free-image/56961296?adppopup=true
https://www.gettyimages.com/detail/photo/green-blue-and-purple-iris-royalty-free-image/489756064?adppopup=true
https://www.gettyimages.com/detail/video/fagradalsfjall-volcano-eruption-lava-in-4k-dlog-stock-footage/1316495015?adppopup=true
https://www.gettyimages.com/detail/video/fagradalsfjall-volcano-eruption-lava-in-4k-dlog-stock-footage/1316495109?adppopup=true
https://www.jpl.nasa.gov/images/pia13201-mount-etna-insar-time-series-animation
https://commons.wikimedia.org/wiki/File:Sierra_Negra_Volcano_2.jpg
https://www.gettyimages.com/detail/illustration/middle-america-political-map-royalty-free-illustration/831043024?adppopup=true
https://www.gettyimages.com/detail/illustration/galapagos-islands-gray-political-map-royalty-free-illustration/1344783781?adppopup=true
https://www.earthobservatory.nasa.gov/images/5994/lava-at-sierra-negra-summit
https://www.gettyimages.com/detail/photo/sierra-negra-volcano-royalty-free-image/1170291852?adppopup=true
https://www.nature.com/articles/s41467-021-21596-4#rightslink
https://www.gettyimages.com/detail/photo/sierra-negra-volcano-in-the-galapagos-royalty-free-image/636304044?adppopup=true
https://modis.gsfc.nasa.gov/gallery/individual.php?db_date=2018-08-04
https://www.gettyimages.com/detail/video/fagradalsfjall-volcano-eruption-lava-stock-footage/1312341668?adppopup=true
https://www.gettyimages.com/detail/video/close-look-on-eruption-of-the-fagradalsfjall-volcano-in-stock-footage/1333774272?adppopup=true
https://www.gettyimages.com/detail/illustration/radioactive-warning-yellow-circle-sign-royalty-free-illustration/1202947205?adppopup=true
https://www.gettyimages.com/detail/video/plexus-soft-background-stock-footage/1307122929?adppopup=true
https://www.gettyimages.com/detail/illustration/volcano-icon-set-isolated-on-white-royalty-free-illustration/521809884?adppopup=true

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37 Comments

  1. If Danté's Peak and the Covid outbreak thought me anything it is that the locals will not believe science and just keep going on with their lives (BeCaUsE oF tHe EcOnOmY) and just simply die in the imminent disaster, realising too late that theey should have listened to scientists

  2. Wow
    This man comes in this channel also
    U are doing good work sir
    Please keep it up!!!
    I really appreciate your good videos

  3. ALRIGHT I'M WATCHING THE VIDEO DESPITE IGNORING IT FOR AN ENTIRE WEEK BUT IT STILL GETTING RECOMMENDED TO ME!
    It wasn't bad, but damn that algorithm…

  4. I wish Hank had explained the radiocarbon dating technique better. I don’t understand how the proportion of C-14 would really tell us anything, if the ratio is following ideal exponential decay both in and outside the liver. Basically no matter how old your liver is, I would assume the ratio in it would be the same?

  5. my liver is far from 3 it put in some work when I drank. drank pretty heavily for, more than a frew years. not enough to damage anything much. but 7 months sober and everything is working out.

  6. Hank, why isn't this two separate videos?
    The volcano info is super cool and not even mentioned in the title.

  7. I am an esteemed psychologist from Yemen, and I once went into the great pyramid of Giza and found a jug of urine that belonged to Pharaoh Ramesses ii, I drank 50ml of it and had strange dreams for a whole week:-

    1- This might sound a bit odd and random, but I have actually dreamt of Zeus mating with a palm tree and begetting an ant that is capable of crawling on the edge of the Higgs Boson!

    2- I also dreamt of my mitochondria protesting to break free from my organelles, claiming that nature has enslaved them!

    3- On another night of a full moon, I dreamt of Professor Noam Chomsky eating books and regurgitating the field of Modern Linguistics!

    4- The funniest dream I ever had, was when I had a vision of a Neanderthal swallowing a whole apple, and it played ping-pong with his heart while passing down his esophagus!

    5- This is by no means a joke, but the most disgusting dream I ever had, was of a female's menstruation blood turning into jelly and being marketed by an Oompa Loompa as Halloween treats!

    6- I also had a nightmare of riding on a mare at night, with the Pharaoh's personal witch, she was pregnant with a fetus that was eating her placenta!

    Do you think my dreams have any philosophical implications at all?

    I'm just a little concerned that I'm having a neurological malfunction!

    Given that I've heard my neurons conspiring to abandon the dwelling of my skull, things don't seem to be heading in the right direction, ever since!

  8. With the recent compilation video about Carbon dating, I think I've heard the Carbon12 vs Carbon14 enough times by now. lol.

  9. Volcanic eruption and earthquake prediction share some similar problems. Both involves the build-up of pressure before the eventual release. There are many signs we can observe and measure, and we can be very sure it's getting there. The amount of stress accumulated can be estimated, and so can be the strength of the ground in the area.

    Past certain point, all you need is a (relatively) small break in the ground (slip in the fault), and the movement would cascade and propagate. But when is the big day? Is it tomorrow? The week after? Years later? It is that trigger that we don't know enough to predict.

    It is also this unpredictable nature that makes eruption and earthquake hard to study as well, because we can't usually monitor the event closely enough. We can't just set up equipment and had it run for potentially years (and possibly still miss the event). It is hard to 'capture' an event with really good detail.

    What those scientist said about the success of the prediction is not just being humble, but actually had some truth in it. All the textbook signs of an impending eruption are there and quite clearly as well (NOT saying their good prediction is trivial, mind you). But it is the fact that the eruption is so closely capture that is the exciting news for the scientific community.

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