Is There DNA in Dirt?
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- čas přidán 1. 03. 2017
- You know about fossils, but what other secrets are lurking in the ground beneath our feet?
Hosted by: Hank Green
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I don't understand why videos such as this get 'dislikes'. Disliking factual information is ridiculous and illogical. Something to ponder: If one does not like truth, does that mean one likes being lied to?
Laura K Maybe they just didn't like the style of the show .
Finding a CZcams video with no dislikes and over 5000 views is almost impossible. Some people do dislike these videos but I imagine a lot of the people who dislike these videos do is solely for the sake of disliking the video.
there was fucktonnes of asshole who likes to show their negativity all the time in the world.
It is very likely that for the sake of countering various bot techniques, CZcams (similar to reddit,) has an algorithm that fudges the like and dislike numbers.
I don't understand why people feel the need to make these types of comments. Maybe they thought the title was clickbait? Maybe they don't like the format? Maybe they accidentally hit dislike? Also, your comment reads like you were going for that "enlightened" sound and it's just cheesy.
Growing DNA found in antarctic ice... What could possibly go wrong? I for one welcome our new Cthulu overlord.
AboboKing
All hail Cthulu
AboboKing the organism would die in the wild
Well, we've clearly outlived these organisms already.
AboboKing hail hit( shit wrong one ) I mean hail cthulu
LOL!!!
Sometimes I feel like this channels too good to be real.
Some of it is too real to be good
If Sherlock Holmes could have analyzed this DNA he'd have said, "Sedimentary, my dear Watson and Crick."
Master Therion good joke just work on your set up to it
Obviously, Therion-sama.
Master Therion
Thumbs up, sir!
Delete this.
JK
😂😂😂
Hi there, SciShow! I would love for people to learn about the terrifying and sudden nature of cerebral aneurysms! I had one rupture at 19 and I think it would make for an interesting video topic!
phantasm1234 I'm glad you're ok :)
phantasm1234 someone's getting creative 🙄🙄😖😖
+
My Grandmother had one at 70, spent 5 months in the hospital and lived to be 90.
I could have sworn you said your were 17 before.
Soooooo how long until we are making Jurassic park?
Never.
Because PETA would break in and set the dinosaurs free.
KriegsMeister27
But what if we already are.
*mind blown
Schwarzer Ritter Or because remains from such old fossils hold no actual DNA.
Well, we are sequencing woolly mammoths. Just google it.
Sara Stankovic do you realize how long ago dinosaurs roamed the earth?
Besides using sedimentary DNA, scientists are also trying the last few years to find DNA in aquatic environments. Unfortunatly, the longest DNA stay in water is about a month. So it will only be usefull for monitoring the presense of species.
Yeah, and it is not so useful for the purpose of conservations when you can't tell how many individuals of a certain species are there, or how old they are. The technique has a lot of potencial, but also a lot of limitations.
milanoost I've used this for rare endangered species. It's much less invasive than tromping around a creek looking for all 5 of them.
You forgot to mention in the PCR bit that forward and reverse primers are needed to synthesize the new DNA. You can't just plop in any DNA sample; you need specific primers to choose a sequence for replication and start the PCR at all.
I suspect they used the "internal transcribed spacer" (ITS) region. It's a really cool technique for species identification and phylogeny. Look it up ^_^
Did you just assume my DNA sequencing pattern!?
heeloo
Is there DNA in a DNA?
Gimberg Preval no
Gimberg Preval no but there's base pairs, sugars, phosphates, hydrogen etc etc etc 😂😂😂
DNA is just coded information, basic molecules chained up together in 1 and 0 but in this cace it is more 1,2,3,4
Isnt rna half a dna
SirPetterTheFirst
isn't it basically 1 and 0 because they bond in pairs
Thank you for scienceing the shit out of my day. I like having something new to contemplate when I'm bored at work. Also, gotta say, I'm super excited about SciShow Psych.
my wife works for the company that makes the best kits for extracting, isolating and sequencing dna and rna taken from just such difficult to test sources. Their company was recently acquired primarily for that tech. It's very cool stuff and extremely interesting science.
The Mitochondria is the powerhouse of the cell
I just love this show - how can you not
Fascinating stuff! Gotta check that moon rock now ...
This is so cool! I'm a soil ninja and I even haven't heard about this. I wonder how they target areas that would have more DNA and what horizons have the most.
Answering questions I never even thought to ask.
I put my DNA in Plant's so I can grow my own child w/o the worry of child support.
Archeologist *scratches head while paceing and thinking*
Archeologist " dang it i contaminated my dig site"
You gotta love science! Thank you for all this information! Every video is definitely interesting. Thank you
You should talk about metagenomic sequencing in another episode. So relevant to what you talked about in this episode!
"Never clean out DNA vials with your spit." ~ Rick Sanchez
can you do a video on the supposed oldest organism found. It was found in hydrothermal vents supposedly from 4.28 bil years ago
I think Hank is by far my favorite host!
This is really interesting since I've literally just learned how to do that PCR technique in college
wonderful!
I kept expecting him to end each sentence about DNA with "Bingo. Dino DNA."
Just a note, DNA polymerase is typically no longer used as it can break down during the denaturing phase of PCR as denaturing DNA requires high temperatures which can cause DNA polymerase to break down as well. A new enzyme named Taq polymerase which serves the same purpose is usually used in modern techniques because it won't denature and it can synthesize DNA faster than DNA polymerase.
Science and technology is just amazing
if there is DNA in dirt, could you clone the earth?
PMW3 🤔
Can you teach us about natral auburn hair? Ive tryed to reaserch it and keep getting the same results. It usally just gets catigorized as red but its not red. I have auburn hair and it may be a mutation but i would love to learn more about it.
this channel has gone a long way . great channel. I don't think it's only for nerds
He makes it sound so easy.
I definitely whispered 'lil bits' when he said little bits....
Sweet science all night long!
I found a mammoth bone in my back yard and still have it
I never thought of bacteria transformation as 'safekeeping' dna. Guess it does that too
Microbiologist here, I do a ridiculous amount of PCR. Just want to clear up the dramatic air that this video puts around PCR. If you handle the tubes reasonably (basically, wear gloves and don't put your fingers on the inside surfaces of the tube) then it's really not hard to avoid amplifying your own DNA, unless you're working with a human DNA sample in the first place. But if you're working with bacteria like this video implies, then a false positive from your own DNA is usually not the go-to diagnostic--there's a million other things a false positive more likely to be.
DNA inside of DNA inside DNA you get it
Few times I've been around that track
So it's not just gonna happen like that
'Cause I ain't no hollaback girl
I ain't no hollaback girl
Scishow video suggest: lichtenberg figures. (Path of least resistance, lightning, rivers, fractals etc)
So I'm not joking when I piss in the woods....and tell my friends, "excuse me, I want to leave some of my dna for the future well being of the forest.
Makes me wonder what DNA remnants might be found in the Dogger Banks. It would be cool to be able to learn more about life in Doggerland before it flooded about 8,000 years ago.
Uuugh PCR... Giving me flashbacks to my final year project for my science degree.
I was almost going to believe that sand is a living organism due to Google .
Thanks for the videos
That moment when you realize you're trying to keep dirt clean.
Science jobs can be weird sometimes.
Where can I get his yellow and black shirt?
Are you all blind, hes not wearing a shirt at all, its all an illusion!
TheNotEverything is this like the white gold or blue black dress ?
What dress?? I don't know what you're talking about.
TheNotEverything You fucked it up... Not yellow and black, but yellow and white.. Than again the base colour is grey while it should've been black for this scenario, so it's a fail all together.
I'm not very happy about the timing of your correction. A month and a half later? It would have been better if you waited another year and then peer reviewed my comment. In forums this is like digging up a grave before it's time. It's better to wait until the worms have finished their job.
Obviously my comment wasn't serious and getting any colours correct wasn't the point of it. In fact I would suggest that getting the colours wrong and calling them yellow and black adds to the comedy of it by suggesting something that's almost the opposite of what the colours actually are. Thank you for allowing me to make my joke comment even funnier by giving me this chance to explain the joke.
Can someone tell me what lav mic is he using?
BOARDWALK BURGERS? MORE LIKE BORED WALK BURGERS, CAUSE THE BURGERS AREN'T HAVING FUN!
Everyone assumes scientists use gloves/lab coats to protect themselves - in reality lots of times it's to protect their work.
I leave my DNA everywhere in the house!
if you bring a ham sandwitch to the vacuum of space and leave it there, how long will it remain edible?
Theldras Pneumonoultramicroscopicsilicovolcanoconiosis that's actually interesting. My guess is "for a long time"
I doubt very long, the water in the sandwich would boil off fairly quickly and cosmic radiation would radiate and break down the organic material.
Not long because the hamsandwich will bring a tiny atmosphere with it
Sure Mars is extremely cold, but that's not enough to keep the DNA safe there, in the end Mars is being exposed to a lot of radiation thus it's hard for the DNA to survive.
"Sedimentary DNA will tell us about life on worlds beyond our own." Isn't that presupposing that not only will alien life be carbon-based but DNA-based?
4:18 But looking for DNA on mars is like looking for a fluent-hindi speaker on the North Pole. We don't know that life forms anywhere else could have developed with DNA, or at least the DNA we know today. They could be some other element-based, I think you covered that in another video, too.
This video should probably have a different title, at first i was like "of course there is DNA in dirt - there are soil microbes." But then I watched the video and realized it is about something more remarkable.
I can't tell if the stripes on his shirt are blue or green
im willing to guess blue
It's obviously gold.
Their RGB value shown by the video is 51, 63, 76 (or 333F4C in hex), so, disregarding brightness, the relative mixture of the three primary colors is 26.8% red, 33.2% green and 40% blue.
Probably blue since they film in front of a green screen.
They're blue.
dirt! nice
Contamination can be easily avoided by addition of specific primers that anneals only desired dna and polymerase only amplifies them...
Is it ok that I can purr? And will my purring do the various things that cat's purring does, like relieve stress, help heal things, etc?
Is it really possible to make a Ben 10 Omnitrix in real life....
So that means if I accidentally swallowed soil? I accidentally swallowed a t-Rex?
Baconlaymedown I imagine you have the same chance of doing that as taking a breath and inhaling part of a butterfly's fart - the particles are around, just thinly spread :)
This is why anthropologists in Swizerland and Germany are interested in keeping the earth that surrounded the teeth and pelvis of bones for further studies.
So... we dont need a muskeeto in amber?
A little word of advice there, uh, Morty... Never clean test tubes.. with your spit!
The T-Rex was in a lower strata than the trilobite, doesn't that kind of mess things up?
I always wondered what was in dirt
Grayson Alexander Mostly the parent material, which is the bedrock it's on along with any landscape processes that is moving soil on the surface (alluvial, colluvial, loess). Horizon A is the uppermost and has the most organic matter from resident plants and animals mixed with the parent material. Horizon B has organic material that has leached through the profile but is a higher proportion of pm. C is all broken down, weathered pm and Horizon R is the pm. There's more horizons, like O which is pure decaying organics and E which is found below B in well weathered forests.
If you want to know more, google Soil Taxonomy and read the stuff from the USDA and universities.
WOW!
Instead of DNA, I would expect a completely different chemical to store genetic info on Mars, unless an chunk of Mars carrying life really did seed life on Earth.
I can dig it.
Could you maybe fade in the audio on the intro a bit because I fucking jump everytime
Neat! Since it's mostly traces of dna though, could they ever find enough to discover an unknown plant or species?
AmaranthAngel They have been doing this at an ever increasing rate just amongst our current living species as DNA sequencing gets cheaper and cheaper
"PCR" ... oh A level biology, how ive missed you...
What I am hearing: JURASSIC PARK IS REAL NOW!
What Hank is saying: actual science (which is still *really* interesting)
why am I tired all the time? or sleep so much?
TITS MGEE 93
You mentioned permafrost in Siberia. Can you talk about the big crater forming due to climate change?
give me the helling D N A P O I N T S
@1:38 -- "Bacteria can incorporate sequences of other organism's dna into their own genomes"... Does he mean by horizontal gene transfer?... or is he saying that bacteria can pick up the DNA *from the dirt* & incorporate it? I'm betting he means HGT... in which case he should explain what it means to the presence of the sedimentary DNA.
We can find DNA in the soil but not the supposed 'pee' tape starring the Donald. Priorities people. jk
fallen leaves, fallen leaves, fallen leaves on the ground!!!
so how long till we make jerrasic park? and then how long till we make a mistake and end up with Trex, Raptors and Trex Raptor cross breeds roaming the earth and eating us
The DNA in you're thumbnail is left handed while most DNA is right handed.
What property of DNA causes it to break down when exposed to sunlight?
UV light is really good at destroying or altering organic compounds. The UV can break bonds forming dangerous radicals or shred the DNA.
I didn't say DNA absorbs UV but that should have been implied. Unless I am supposed to go into the complex thermodynamics and physics of UV and atoms i'm not sure how I could have answered the question much better.
joseph blake, I don't know if you realize it, but you are being disrespectful to multiple well-meaning people in these comments. It's perfectly fine if you didn't understand TheRedKnight's answer, but it was a correct answer. Whether or not it satisfies Invalid name's curiosity depends on Invalid name's full set of knowledge and understanding; which we don't know. It's perfectly reasonable to provide as much information as TheRedKnight provided, and if Invalid name was still confused, the user could ask followup questions. That's what dialogue is all about.
Don't forget to be awesome, Joseph! :)
I don't know the thermodynamics behind how UV interacts with molecules. Though I know enough about the basics to be able answer a simple CZcams question. This is a Scishow comment section not the comment section of a channel dealing with physical chemistry. If my answer did not fully answer his question he could google more about it.
If you believe my answer is not satisfactory then please properly answer his question as you must have far more knowledge on the subject.
joseph, if OP was able to understand that answer, he wouldn't likely be asking science questions in CZcams comments. Your answer comes off as you just trying to show off how very clever you are, even though your answer fails to actually educate; it depends on the reader having a grasp of an entire lexicon with which they are largely, if not almost entirely unfamiliar. TheRedKnight did not say anything untrue, and his answer was a fine starting point, and potentially a perfectly satisfactory answer, depending on the level of detail OP desired.
I think it's great that you want to help make sure that SciShow comments get the science right, but I also think it's important to do so without being disrespectful to users who are contributing in good faith.
Is it possible to let's say clone an ancient plant or animal? The resurrection of extent animals and plants.
Even though ancient DNA can be found the likelihood that all of the DNA from an organism would be perfectly intact is very small. Even then DNA is just a blueprint and without the proper proteins to read the DNA nothing happens.
My sediments exactly.
Bacteria evolving to resistant antibiotics 30,000 years ago? That's crazy!
Many different organisms produce natural antibiotics to fight of bacterial infections
Staph that is resistant now has been found in historical samples from before antibiotics. It was in the population but just wasn't strongly selected for until now.
could there be any living organism in universe without any DNA
Question : our biological system, here on Earth, is centered around DNA as we know it. ACGT. But accoding to Sciensium (you know, the third Veritasium^^), we recently manufactured other components to DNA, that differs from LUCA's. The question is, if we can make something out of the system to create life, how can we be sure that a LUCA from another planet hadn't a totally different structure that doesn't work like our DNA, but still did the same job in the past ? How can we be sure we don't accidentally discard actual "life" from other planets because we think "that weird structure in the sediments doesn't look like what our biological system can present" or something ?
TAQ polymerasur ....our human DNA Polymerase will degrade at the temp required for PCR. TAQ comes from yellowstone hot springs, kinda cool......
I wonder how mich DNA has already infected Mars from the Curiosity rover. There had to be a few skin cells on that thing when it landed. Some scientist will find that skin cell in 2215 and say "Have humans secrety been on Mars for over 200 years??"
nasa will clean them for ~5 weeks then put them in a small pod to prevent contamination in transport, and the pod only opens outside of the atmoshpere where any cells would certainly die in the UV light,
that's so hard to find xD
I'm not surprised since dirt is made out of dead things and other stuff..
DirtNA!
So the dead are pushing up daisies with their DNA in them.
PCR ! PCR ! PCR !!!
if a DNA sample from Mars can get contaminated when brought back to earth.. wouldn't a spaceship contaminate the DNA material on Planet Mars or anywhere we send it to in the first place. because the spaceship can carry DNA samples on it from the Earth
NASA do clean their spaceship for this. Even from the first moon landing NASA, cleans all their spaceship for orbiter to rover to avoid Earth-borne organic contamination. Although its not 100%, NASA does it.
So I guess they'll take more precautions for this mission.
indeed. I worked with the Viking Missions to Mars, and the whole lander was encased in a bioshield shell and baked for two weeks before being shipped to Florida for the mission. The bioshield was not opened until the lander was out of the atmosphere, and theen it was rotated in sunlight so the UV could kill anything that made it that far.
is there DNA around my anus? I mean it's made of cells so it makes sense.
Also, there is no dirt around my anus.
A scientific question: What kind of primers would the scientists use to amplify the genes? they could use the TATA box as a primer but we could miss out a gross number of species that also function without them...😑
Here's hoping technocrats are prevented from being on any of them teams that do this research.