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6 'Undetectable' Poisons (and How to Detect Them)

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Poisoning has always been a popular method of getting rid of one’s enemies, but is there actually a “perfect” poison capable of being completely undetectable? Here are 6 of the poisons that have confounded doctors throughout history! Hosted by: Hank Green ---------- Support SciShow by becoming a patron on Patreon: https://www.patreon.com/scishow ---------- Dooblydoo thanks go to the following Patreon supporters: Kelly Landrum Jones, Sam Lutfi, Kevin Knupp, Nicholas Smith, D.A. Noe, alexander wadsworth, سلطا الخليفي, Piya Shedden, KatieMarie Magnone, Scott Satovsky Jr, Charles Southerland, Bader AlGhamdi, James Harshaw, Patrick Merrithew, Patrick D. Ashmore, Candy, Tim Curwick, charles george, Saul, Mark Terrio-Cameron, Viraansh Bhanushali, Kevin Bealer, Philippe von Bergen, Chris Peters, Justin Lentz ---------- Looking for SciShow elsewhere on the internet? Facebook: http://www.facebook.com/scishow Twitter: http://www.twitter.com/scishow Tumblr: http://scishow.tumblr.com Instagram: http://instagram.com/thescishow ---------- Sources: https://www.britannica.com/science/metalloid https://www.dartmouth.edu/~toxmetal/arsenic/history.html http://jmvh.org/article/arsenic-the-poison-of-kings-and-the-saviour-of-syphilis/ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1742758/pdf/v079p00391.pdf https://www.chemistryworld.com/opinion/marshs-mirror/2500415.article https://www.health.ny.gov/environmental/emergency/chemical_terrorism/cyanide_general.htm https://calpoison.org/news/acute-cyanide-poisoning https://emergency.cdc.gov/agent/cyanide/basics/facts.asp https://phys.org/news/2015-03-cyanide-poisoning-seconds.html http://ccn.aacnjournals.org/content/31/1/72.full https://www.washingtonpost.com/archive/local/2004/05/18/howard-teen-guilty-in-poisoning/d063a0ea-aa01-4f2b-90b6-3bfd901005ed/ http://www.slate.com/blogs/crime/2013/10/01/tianle_li_xiaoye_wang_why_thallium_is_known_as_the_poisoner_s_poison.html https://calpoison.org/news/thallium-poisoning https://www.ncbi.nlm.nih.gov/pubmed/6338655 https://www.theguardian.com/world/2013/nov/06/polonium-210-poison-alexander-litvinenko https://www.theguardian.com/world/2016/mar/06/alexander-litvinenko-and-the-most-radioactive-towel-in-history http://www.independent.co.uk/life-style/health-and-families/health-news/alexander-litvinenko-what-does-polonium-do-to-the-body-inquiry-andrei-lugovoi-and-dmitri-kovtun-a6824811.html https://www.chemistryworld.com/news/polonium-210a-deadly-element/3003225.article https://www.britannica.com/science/alpha-particle https://www.livescience.com/54901-free-radicals.html https://www.poison.org/articles/2007-dec/antifreeze-bad-for-your-kids-and-pets https://calpoison.org/news/diagnosis-treatment-ethylene-glycol-antifreeze-ingestion http://www.motherjones.com/environment/2014/01/inquiring-minds-deborah-blum-poison-forensics/ http://www.tandfonline.com/doi/full/10.1080/15563650701419011 https://www.webmd.com/a-to-z-guides/what-is-metabolic-acidosis#1 http://articles.latimes.com/1988-09-01/news/ga-4412_1_common-poisons https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3089829/ https://www.britannica.com/topic/cardiovascular-drug#ref295301 http://articles.latimes.com/1991-04-09/local/me-223_1_murder-case Images: https://commons.wikimedia.org/wiki/File:GHS-pictogram-skull.svg https://commons.wikimedia.org/wiki/File:Arsen_1a.jpg https://commons.wikimedia.org/wiki/File:Marsh_James.jpg https://commons.wikimedia.org/wiki/File:Marsh_test_apparatus.jpg https://commons.wikimedia.org/wiki/File:Sodium_Cyanide.jpg https://commons.wikimedia.org/wiki/File:Kaliumcyanid.jpg https://commons.wikimedia.org/wiki/File:Thallium_pieces_in_ampoule.jpg https://commons.wikimedia.org/wiki/File:Alpha_po_lattice.jpg https://commons.wikimedia.org/wiki/File:Ethylene-glycol-3D-balls.png https://commons.wikimedia.org/wiki/File:Samlpe_of_Ethylene_glycol.jpg https://commons.wikimedia.org/wiki/File:Glycolic_acid_3D_ball.png https://commons.wikimedia.org/wiki/File:Calcium_oxalate_crystals_in_urine.jpg https://commons.wikimedia.org/wiki/File:Nerium_oleander_flowers_leaves.jpg
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Text Comments (1772)
Pakistani Proud (3 days ago)
_"murder is bad"_ - hank green (2017)
Blake Herron (6 days ago)
welcome to the government watch list, fellow viewers :^)
MAX Q (6 days ago)
Isn’t the lethal dose of polonium-210 a few micrograms, not milligrams?
Pandora Lupin (6 days ago)
0:28 but is it? Is it really?
moto1p1 (8 days ago)
6 'Oxy-Moronic' Video Titles (and Why They're Moronic)
ace it gaming (10 days ago)
10 deadly assassins that cant be found (how there are found) lol
vishesh jain (10 days ago)
This title exactly sounds like, ' 6 uneatable foods and how to eat them '
Panda Behr (11 days ago)
can you make your urine poison
MEGATRON 11X (11 days ago)
And... I now on a watch list
Adamantly Ada (12 days ago)
My friend’s brother once made a belt out of oleander branches and had to go to the hospital. He also had a huge rash around his midsection and refused to go swimming without a shirt because of it. Needless to say he never did that again.
The_Mad_Bear 1096 (13 days ago)
Welcome to the FBI watchlist
KCN (14 days ago)
Finally I found somewhere I belong.
Chris Busenkell (15 days ago)
you have to show support for AT LEAST ONE OF THE POISONS?!!? if you were in charge of the king's dungeon and have to poison a child molestor which would you choose? what if it was Socrates you were putting to death?
Hats and Dragons (16 days ago)
Today on "I'm a writer I swear I'm not going to actually kill someone..."
Godvenom x (17 days ago)
You forgot about the most dangerous toxin: Botulinum Toxin! 1 nanogram of it can kill an adult. 5 tablespoons of it can wipe out the human race||
901pro gamer (17 days ago)
another good poison would be radium but it is a very slow acting one
a guy (18 days ago)
I'll be sure to use one of these, thank you!
solgaleo games (18 days ago)
Your really smart! I don't know this stuff!
Tonya WhiteSmith (18 days ago)
I think my ex boyfriend did this when I moved here my thyroid shut down and then later I was poisoned another way by someone he knew.
Jj Fatts (19 days ago)
So ... can someone tell me what's up with the wallpaper Hank is wearing?
meghan parris (19 days ago)
I thought antifreeze didnt have a sweet taste anymore.... supposedly to keep people from killing others with it, and also so pets/wild animals wouldnt drink it if acidentally left out.
Jerry Hu (20 days ago)
More like "How to attract the NSA's attention"
jfbeam (20 days ago)
Most automotive anti-freeze's contain a strong bittering agent to discourage people (and pets) from drinking it. You won't intentionally drink it.
ihartevil (21 days ago)
well if you want to try to get away with murder it might not work it wouldnt have worked on me because we had phone calls to prove it was murder my dad tried to kill me by tampering with the moths/caterpillars in my stomach knowing i had them and what they could do because he watched your scishow vid that i cant prove however there was a youtuber who called him and told him exactly what was going on and how he needed to get me to a place where my stomach could be pumped the reason i am still alive and going to be completely fine is because of pure luck and my aunts friend so getting away with murder is easy if you dont leave any traces tampering with parasites in somebodys body is a decent way to try thx for this ha bisky vid i love you hank and i love that i get to say my dad tried to murder me i am a kitty i have 9 lives
Juxtaroberto (21 days ago)
The electron volt is a unit of energy, not momentum.
Rin Akihime Uirichiro (22 days ago)
My brothers was sitting beside me while watching this. They said murder is good for rin
Asher_wol4 A!p][5 (25 days ago)
I'm just curious what happens if someone were to take a daily dose of poison (preferably cyanide) ? Will they become immune to poison or will they just slowly die?
huh. ethylene glycol is interesting because i know that POLY-ethylene glycol is a SUPER strong laxative. (dont ask me how i know that, its a long story)
macsnafu (26 days ago)
Watching this video is just...research for the murder mystery I'm planning to write. Yeah, that's the ticket!
Jay Thompson (26 days ago)
for those interested about the murdered mortician; http://articles.latimes.com/1991-04-09/local/me-223_1_murder-case and; https://patch.com/california/altadena/pasadena-former-altadena-crematory-operator-david-wayf4e4f0e149
Billy boy (26 days ago)
a friend of mine eats oleander
sirati97 (27 days ago)
eV is not a momentum unit!!! eV/c is
Skeptical Eye (28 days ago)
Thanks, I will keep those in mind
Wolf Heart (1 month ago)
I was suggested this video by Youtube, just so were clear :)... Next 4 plants that are great for humans...
Crystal Price (1 month ago)
How horrible.
Grace Glover (1 month ago)
"Murder is bad" -Hank Green 2018
Rendra Rifaldi (1 month ago)
in early 2016, an Indonesian woman named Jessica Kumala Wongso poisoned her friend, Mirna, in a cafe using cyanide. Mirna who drank the poisoned coffee died minutes later after ingestion, the funny thing is the cafe had CCTV that proved Jessica has put something into Mirna's coffee before the murder took place aand yet the case took a year to finish. Jessica convicted with murder with 20-years jail sentece.
Akrivi Griva (1 month ago)
His shirt is so fancy
Loveregretlive (1 month ago)
Instructions unclear, shot guy with umbrella
Noah'sKnowledgeCenter (1 month ago)
Souchirouu (1 month ago)
So, basically if you're going so far as to poison someone you should use two or more poisons with similar symptoms? Not only will that kill the target quicker, even if they figure out one of the poisons the other one will still kill them.
Hamuel Agulto (1 month ago)
Thanks for giving me some choices😊😊
Bryce Cain (1 month ago)
Why'd you make this? It is making it easier for murderers
JRodgesevant (1 month ago)
Another way to detect arsenic is that the urine of the victim will smell like apricots.
Thyrmite (1 month ago)
2:46 ...And it failed. Yes, cyanide failed to kill the almighty Rasputin. A couple of gunshots and stab wounds, along with a brutal pummelling by multiple men had to finish the job. Although many people speculate that the cyanide, which in the dosage used was enough to kill several men, was stored in damp conditions, essentially rendering the cyanide useless.
Kj16V (1 month ago)
7. That shirt. It's killing me
LadyofSwearsalot (1 month ago)
No aconitum aka wolfsbane?
Azraelle (1 month ago)
No mention of iocane powder?
vishal v (1 month ago)
missed ricin i guess
Matthew Jochmann (1 month ago)
But what about ricin
Nobody (1 month ago)
If they are undetectable, how do we detect them?
Tudifrudi Johansen (1 month ago)
Undetectable poisons and how to detect them hmm undetectable? How to detect them? Whut?
Sam Jones (1 month ago)
A mega electron volt is a unit of energy
Aarya Prashant (1 month ago)
The best posion is your mom jk
cosmosofinfinity (1 month ago)
What if you used all of these at once?
Teddy Bear (1 month ago)
You forgot micro transactions
Teddy Bear (1 month ago)
The only cure known is steam sales
Dan Parks (1 month ago)
Buy one for a poison so versions of this particular poison or on the tech to put gas you can make poison into gas by just by getting the port of calls from the poison make him do it into a girl like a spray by a toxic spray but his many different forms of gasOne of the most used there is a word World War I were the first gas pouring gas but the most non-lethal gas is your gas
Adrián Buenfil (1 month ago)
4:26 "Careful, educated guess, based on the symptoms"? House M.D.!
sinancothebest (1 month ago)
No Ricin? Can't be the only breaking bad fan here
Holy Keyblade (1 month ago)
Speaking of Cyanide, can you do a video about the pseudoscience of “Vitamin B17” and how con artists try to peddle this dangerous chemical as a cancer treatment. It’s toxic because the metabolic byproducts is excessive cyanide in the body? I’ve seen this pseudoscience everywhere lately, and this is literally killing people.
Michael Skinner (1 month ago)
I believe there's always a way to a peaceful compromise
Janga Pardhu (1 month ago)
Electron volt is a unit of energy not momentum
randomzoonerd (1 month ago)
Oleander shirt? Love it!
First Last (1 month ago)
Dear hank, please stop telling people how to murder and causing more murders. Sincerely, the civilized world.
bdbdbd (1 month ago)
Polonium-210: "... as the molecules break down" Polonium is atomic, not molecular and it decays
bdbdbd (1 month ago)
Thallium: "as little as a gram can kill you". Do you have any idea how much a gram is? It's still like half a tablespoon.
Atomic_Mike 24 (1 month ago)
I will now stay in an airtight and strong bunker because I now feel scared for some reason.
were wally (1 month ago)
to delay and mitigate polyethelene glycol poisoning, I'm told you should drink ethanol in liberal amounts. crazy, but the body wants to go to the ethanol before polyethelene glycol so you get so wasted you wish you were dead but you would survive despite it.
REEV LU (1 month ago)
well I didn't understand anything thanks to your France accent.
Luz Cuz (1 month ago)
the 14k ppl who liked this are now on the FBI's watch list.
Mark Berry (1 month ago)
Kids and dogs were especially attracted to antifreeze that had been spilled during car coolant replacement. States have started requiring manufacturers to add terrible tasting compounds to the antifreeze to discourage the kids and dogs from tasting it.
Bella Sofia AJ (1 month ago)
If you're detecting the undetectable, doesn't that make the undetectable, detectable?
Mark Strouthes (1 month ago)
Iocaine. I’d bet my life on it.
Cory Cook (1 month ago)
What about Ricin?
JefftHeChef (1 month ago)
Undetectable poisons and how to detect them (I think they forgot what undetectable means.
Nevan Mahattana (1 month ago)
U said it was undetectable
Nenad IC XC Shuput (1 month ago)
Title doesn't contradict at all lol
jason corn (1 month ago)
do you know what poison is the most lethal ? lead... ...travelling at 1200 m/s get it?
Droplul (1 month ago)
Undetectable poisions that are detactable... Uh
The Drunk Alchemist (1 month ago)
your shirt colour makes you look like youre dead. Burn it
Ryan Liu (2 months ago)
I'm scared
ninja2010x (2 months ago)
What about Strychnine? I'd include this one in your list........
Mauricio alvarez (2 months ago)
3:31 Cause human beings need oxygen. Ha *scoff*
Dhan 4004 (2 months ago)
Undetectable Poisons and How to Detect Them really undetectable should not be able to be detected
Lone Wanderer (2 months ago)
Murder is bad -Hank Green
https://youtu.be/E9peKIdne44 https://youtu.be/oqqWdaaTq7A https://emergency.cdc.gov/agent/ricin/facts.asp https://www.google.com/url?sa=t&source=web&cd=2&ved=0ahUKEwiiy8fpuojbAhUr4IMKHejqDSAQFggMMAE&url=https%3A%2F%2Fwww.health.ny.gov%2Fenvironmental%2Femergency%2Fchemical_terrorism%2Fcyanide_general.htm&usg=AOvVaw2Cxpj_zP3N0jkaT4CLHQJF https://www.allure.com/story/how-botox-affects-your-body/amp https://www.google.com/url?sa=t&source=web&cd=2&ved=0ahUKEwjN9uO7u4jbAhUo6oMKHQDnB40QFggMMAE&url=https%3A%2F%2Fwww.medicinenet.com%2Fscript%2Fmain%2Fart.asp%3Farticlekey%3D79810&usg=AOvVaw3mr0Y0pwgHztye82yWS4oW https://www.medicalnewstoday.com/articles/158647.php https://www.livescience.com/23304-arsenic-rice-fda-health-effects.html https://amp.livescience.com/32880-how-does-arsenic-kill.html
I’m sure my phone is tapped by now
Aravind Srinivasan (2 months ago)
Those flowers on his shirt oleander?
epic0wnag (2 months ago)
what about iocane powder?
g b (2 months ago)
'or your friends'
Raven Chan (2 months ago)
With the thallium it sounds like you’re saying Valium.
Mike Collins (2 months ago)
4:37 I thought you said Valium
Wenhao huang (2 months ago)
9:32 I can’t believe people brag about their crime >.>
Tom Robinson (2 months ago)
Thanks sicshow, I'll just go find my enemies now...
Kyle Doyle (2 months ago)
Joshua Fisch (2 months ago)
John Green is a God
Aaruni Gupta (2 months ago)
Actually, Arsenic still exists in the Chicken we eat.
Dhaval Andha (2 months ago)
irony in the title
Eli McClellan (2 months ago)
They didn't even mention ricin. It's my favorite poison (just because of the science and the history).
EnderGamer 2309 (2 months ago)
Combine Antifreeze and Cyanide and it's the perfect poison .
Hugo Nabais (2 months ago)
Undeniably cool?! I would never call it "cool".... maybe interesting at best!

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