Testing if Sharks Can Smell a Drop of Blood

  • Published on Jul 28, 2019
  • Scientific proof Pixar sits on a throne of lies. Thanks to Bose for their support and for the dopest headphones I've ever worn: bose.life/markrober
    Also, thanks to Discovery for putting my life in danger.
    #SharkWeek begins July 28 only on Discovery
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    More info that was promised-
    What is likely happening is that the sharks can smell the blood but it's just not in a quantity that is interesting to them especially since they don't love human blood that much (btw, I spoke with a marine biologist and mammal blood is all the same from a chemical marker stand point so cow blood is a suitable substitute for human blood). If I did the experiment again, I would want to test human blood vs. fish blood.
    This is the most definitive study done to date in a control lab environment on what is least and most interesting to them: The Biology of Sharks and Rays Peter A. Klimley and Steven Oerding; ISBN-13: 9780226442495. Particularly pages 134-140. Figure 6.7; Table 6.2

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    Summary: I've always wanted to test if sharks can really smell a single drop of blood in the water from 1 mile away. So I went to the Bahamas in shark infested waters and set up an experiment to get to the bottom of things.

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  • Science & TechnologyScience & Technology

Comments • 49 385

  • Laurent Dugas
    Laurent Dugas 39 minutes ago

    All this blood and needle makin me anxious 💀

  • Uuxaul
    Uuxaul 2 hours ago

    Someone gets sea sick. I know what that patch behind your ear was for.

  • caramel unicorn17
    caramel unicorn17 5 hours ago

    I like how thay all appriet it it to take to turns to see that thay been troll and the line was so cute :3
    #sharkcare #shark

  • Chloe Donovan
    Chloe Donovan 5 hours ago

    Is it me but did they merdered someone 😕😕😕😕😕😕😕😕😕😕😕😕😕😕😕😕😕😕

  • Maisie H
    Maisie H 11 hours ago

    Guy:let’s see if the sharks react to these liquids
    shark:boi I’m trina look pretty for TV

  • Trickyy
    Trickyy 11 hours ago

    Is this man trying to die?

  • aka Braydon
    aka Braydon 12 hours ago

    *Greta Thunberg disliked that*

  • Wala na Finish na
    Wala na Finish na 15 hours ago

    I'm here for the meme
    Are you too?😂😂

  • Enmarie Cabus
    Enmarie Cabus 22 hours ago

    Why arent shark attacking them

  • Catastrophic Stupidity
    Catastrophic Stupidity 23 hours ago

    Who would challenge mark to a Rock Paper Scissors match?

  • Kevin Benitez
    Kevin Benitez Day ago

    hey what if you do the same experiment but with fish blood

  • Tates Nice
    Tates Nice Day ago

    he didn't wear the snapback underwater??

  • Alex
    Alex Day ago +1

    “I gotta strategize”
    **actually wins the game**
    What kind of sorcery is this?

  • Lisa Smiles
    Lisa Smiles Day ago

    "Pixar sits on a throne of lies," says the guy who clickbaits.

  • ᕱ⑅ᕱ
    ᕱ⑅ᕱ Day ago

    Was that santa cruz beach at the end??

  • BerlyBear Girl
    BerlyBear Girl Day ago

    It might’ve been different if great white sharks was used instead.

  • Frayza Benton
    Frayza Benton Day ago

    watching this after sidemen video anyone else

  • GachaDraw! [gd&gacha]

    I will never get on a boat to be honest.

  • FanaticFifaGuy
    FanaticFifaGuy Day ago

    Could it have been that the sharks adapted after the first part of the experiment? They realised the scent of blood and noticed the boards and didn't bother going close as they knew it wasn't a real living creature?

  • Ex Hound
    Ex Hound Day ago +2

    If u know u know Ethan Payne

  • Rita Sampaio
    Rita Sampaio Day ago

    Whos here for the insta meme?

  • Fortnite Fortnite

    What type of engineer is he?

    MR_FLUFY _CAT 2 Day ago

    Maybe they aren't interested in you're blood? They have they're on taste too you know like when will they choose they're food to eat

  • Giorgio Iaderosa

    I love how you flipped the tiger shark to trigger the catatonic sleep

  • kleo
    kleo Day ago +2

    shark: i’m about to end this mans whole career

  • Jacob Walsh
    Jacob Walsh Day ago

    Ain't peeing in the ocean considered polluting

  • Kiana louise Rodelas

    I came here because of a meme on my newsfeed lol

    ILYAS RIFQI Day ago

    I thought we had 25 litres of blood

  • Aakash Dharmakari

    Sharks are pretty smart. they knew the first time that if they conveniently fooled the humans that they don't get attracted to blood. SO that next time humans bleeding in water won't care much.

  • Michelle Yvonne
    Michelle Yvonne Day ago

    Mark: *Testing if Sharks Can Smell a Drop of Blood*

    Sharks: *Im about to end this mans whole career*

  • Barux
    Barux Day ago

    Shark belike imma gonna end this mans carreer🤣

  • Deluxe_Blox
    Deluxe_Blox Day ago

    shark:im about to end this mans whole career

    RONALDO EID Day ago

    The shark can smell cow's blood because it smells more than human but they can't smell human blood that good because they don't smell as bad as the cow's

  • Suhaibb17
    Suhaibb17 Day ago +1


  • Gemma Coppola
    Gemma Coppola Day ago

    Are you kidding me of course sharks can smell a drop of blood. Have you ever even read science mark rober

  • Mollie Creagan
    Mollie Creagan Day ago

    sharks are truly beautiful, amazing creatures

  • Conor Owens
    Conor Owens Day ago

    anyone here for more sidemen video?

  • Thaucex
    Thaucex 2 days ago

    That thing behind your ears is for motion sickness right?

  • Tannis Kids
    Tannis Kids 2 days ago


  • Cordaisheia Earlycutt

    I can smell a pizza 59 miles away and it is possible

  • Cloutdoodle
    Cloutdoodle 2 days ago

    4:35 i think thats the minecraft title sound anyone else or no

  • Lieutshinysides S
    Lieutshinysides S 2 days ago

    Here from sidemen

  • susan stecken
    susan stecken 2 days ago +1

    I can smell gum a mile away

  • DABING IS BAD42 Get aids

    I came here from a Instagram post

  • niklas
    niklas 2 days ago

    Got bose qc35 they are suuuperb oh yeah and nice video, subbed

  • paula pardo
    paula pardo 2 days ago

    Wea, man tan bobo JAJAJA

  • Brian Duzick
    Brian Duzick 2 days ago

    Jesus loves you Mark!

  • Jonah Connell
    Jonah Connell 2 days ago

    First of all where did you get the blood...

  • Ethan Mallett
    Ethan Mallett 2 days ago

    Did you pay meme pages to send me here...

  • Jack
    Jack 2 days ago +1

    anyone else from the Sidemens newest vid?

  • Alan Heinrich
    Alan Heinrich 2 days ago

    Looks like the sharks are clearly used to getting fed at the boat...because they swam near the boat the entire time. They didn't care about the blood because why should they when they are going to get a free meal...as they did at the end.

  • Jaxson Merchant
    Jaxson Merchant 2 days ago

    This is like your heart ant veins and Arties of your heart is beating you know it pumps blood

  • Ariaman Ladha
    Ariaman Ladha 2 days ago

    Why did you put seawater instead of just leaving it empty? It still does the same thing which is to test in the sharks like the surfboard.

  • Avery Hickman
    Avery Hickman 2 days ago

    sharks actually don’t prefer humans as a “snacks”. it’s not part of their main diet such as other animals. The only reason they bite/attack people is because of the fact of people’s defensive motions. Sharks only kill less of around 4 people a year.

  • Lejon Cummings
    Lejon Cummings 2 days ago +1

    Mark rober: Testing to see if sharks can smell a drop of blood
    Sharks: I'm bout to end this mans whole video

  • Amber Roy-Stanley
    Amber Roy-Stanley 2 days ago

    Mh but try this with great whites and it’s over

  • That One Weeb
    That One Weeb 2 days ago

    Can you actually pet Tiger Sharks?!?!

  • That One Weeb
    That One Weeb 2 days ago

    Who else came here from that pinterest meme?