6 of the Longest Experiments Ever

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From the bell that hasn't stopped ringing, to observing evolution in action, SciShow presents 6 of the Longest Experiments Ever.

Hosted by: Hank Green
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The Electric Bell

Beal’s Seed Viability Experiment

The Pitch Drop

Framingham Heart Study


500-year micro experiment

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SciShow science Hank Green education learn 6 of the Longest Experiments Ever Electric Bell Oxford batteries dry pile power zinc sulfate manganese dioxide soil William James Beal species hardiness Pitch Drop Thomas Parnell asphalt flow viscosity The Framingham Heart Study Massachusetts cardiovascular disease cholesterol high blood pressure smoking stroke heart disease genetics E. coli evolution bacteria cultures generations strain microbiology Seed Viability

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    Popular Comments:

Asher! . 2018-11-18
Having microbes from 500 years back reanimated... Doesn't sound like a good idea to me. We have enough issues with ancient diseases being awoken with the melting of permafrost. We don't need to do it on purpose.
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Chris P. . 2018-11-15
I know of an even older experiment. 10,000 years ago a scientist named Og put his hand on a cave wall and blew paint upon it -- leaving behind a negative image of his hand. Og predicted that his hand print would survive for all time because he was a mighty hunter and the gods looked upon him with favor. 10,000 years later his hand print is still of the wall of that cave. Og's hypothesis of godly approval has so far proven correct, but perhaps another 10,000 will pass before anyone is sure.
121 2 . Reply
Vincent Gonzalez . 2018-11-13
Purslane is a food, I'm going to use it as self seeding ground cover
121 2 . Reply
Charles Panigeo . 2018-11-10
Muscle Hank will still be alive for the 2514 experiment
121 2 . Reply
gamingnerdsio . 2018-11-05
When a tardigrade dries out, it's called the tun state, where a sugar fills out the cytoplasms of cells, and also replacing the water content.
121 2 . Reply
John Bash-on-ger . 2018-11-02
6:51 Mutations usually only spread over multiple generations. Because you know they spread through the genetic recombination of the parents genetic material during conception. Proofread your scripts better people and learn to understand evolution.
121 2 . Reply
Michael Pierce . 2018-11-02
That electric bill is likely acting as a Franklin's Bell! Which he did design to work with atmospheric electricity. Do they have this Bell connected to ground by chance?
121 2 . Reply
MrMonsterHunter 808 . 2018-11-02
That electric bell is deadass a SCP ☠️
121 2 . Reply
DOVAH FARCRY . 2018-10-26
6:50 too bad i don't believe in evolution
121 2 . Reply
shiny x . 2018-10-22
Guess Hank isn't planning to upload his brain before he dies.
121 2 . Reply
John Tha Vapster . 2018-10-16
Pitch is horrible. Been tearing off pitch roofs for over ten years. It is horrible it burns your skin makes it hard to breathe can even make you sick. Just horrible
121 2 . Reply
Chopperwood . 2018-10-14
i bet my lenevo wired mouse can last longer
121 2 . Reply
Grinnar . 2018-10-14
Batteries were invented long before the time stated here. Look up the Baghdad Battery. It's part of why people better that ancient alien stuff.
121 2 . Reply
Venomous Valentine . 2018-10-13
>500 years in the future
>Scientists open microbe vials
>Species hasn't been seen in hundreds of years
>Future people immune systems don't know what to do
>The plague is back
121 2 . Reply
Ben Willock . 2018-10-13
Well I don't know about you but I plan on living forever
121 2 . Reply
ScarAnrew . 2018-10-09
Can you talk about the Russian permafrost worms please
121 2 . Reply
Georgi Georgiev . 2018-10-06
Who dislikes these videos?!
121 2 . Reply
Billdude21 . 2018-10-05
If our microbes in, those vials cause an apocalypse. They'll be cursing us.
121 2 . Reply
NotQuiteGamesYet . 2018-09-27
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John Bartels . 2018-09-25
121 2 . Reply
Meme King . 2018-09-22
we’ll all be dead
121 2 . Reply
ninth Chakra . 2018-09-21
Some more episodes discussing each of the other forces would be interesting. I'm especially intrigued by how gravity affects space-time.
121 2 . Reply
holly . 2018-09-16
i just had a thought, if you could theoretically put every bacteria on earth in a ball, it would be huge i assume, but what would it look like??
121 2 . Reply
Phillip Miner . 2018-09-13
Number 1 is probably an SCP
121 2 . Reply
vinzent1992 . 2018-09-08
wow he's annoying to listen to. I hate when people try to sound enthusiastic
121 2 . Reply
Christina Byrd . 2018-09-07
Car battery replaced every 4 years? I never had a battery not work that was less than 12 years.
121 2 . Reply
Nathan A . 2018-09-07
I can't wait till bioluminescent trees light the streets at night!
People in this field of research should know there's thousands of people interested in bioluminescent bacteria ect.
121 2 . Reply
Graveskull . 2018-09-05
Wait, how is it 3rd on the list?! 90 years makes it shorter than the electric bell at 6th. WTF
121 2 . Reply
Graveskull . 2018-09-05
Proving the universe will eventually end

Have fun waiting until the actual end of time!
121 2 . Reply
clono . 2018-09-02
so... my alarm clock?
121 2 . Reply
Jonathan Bohn . 2018-08-28
#7 The number of licks it takes to get the Tootsie Roll center of a Tootsie Pop?
121 2 . Reply
Abhi Gamer . 2018-08-26
And pitch liquid
121 2 . Reply
Jason B . 2018-08-26
But what if number 6 IS the cause of the zombie apocalypse?
121 2 . Reply
gatekeeper88 . 2018-08-25
I've said to many of my workmates in gardening why can't we take makes weeds so prolific and put that in food crops. Surely we can figure out the genome of some of the most common weeds and then GM that into food crops. Imagine a field of wild growing corn.. or cabbage, or onions, or banana's etc etc so forth and so on.
121 2 . Reply
fburton8 . 2018-08-21
Lord Kelvin set up a few pitch flowing 'experiments' (more demos really) here at Glasgow University. That was in the 1880s.
121 2 . Reply
Axolotl . 2018-08-21
Human evolution, the longest experiment
121 2 . Reply
Daniel Blair . 2018-08-19
Im betting the bell somehow manges to use the electrons to power the ringer of the bell while the ringer then picks up electrons on contact and basically replaces some of them. I've never really taken a good look at the bell so i have no idea if its connected in a way where that could be possible. Im not saying its a lossless or eternally running system, just maybe a somewhat regenerative system. And as for the pitch drop i have a feeling the chemical makeup has been changed slightly by esposure to light and ambient heat meaning the older any asphalt is the more it solidifies. I imagine it may be losing something that gives it some vescosity by evaporation or the sublimation caused by photons and whatever is sublimating just happens to cause vescosity to change in very big ways with very little change in composition. I say that last part bcause of how slow photon sublimation is. Im also betting theres at least 1 other component to it because its not a super simple mixture, or would it be a solution? Not sure. Anyway. Those are my guesses for those 2.
121 2 . Reply
Aman Khandelia . 2018-08-15
The coolest thing will be somebody from 2514 commenting on this video.
121 2 . Reply
handsomegoodguy4520 . 2018-08-14
(1)- On, 0:00-0:58, That's Amazing A Battery Lasting Two Decades "There Is A Battery That's Been Running For 177 Years!" I Need That Kind Of Battery, For Gaming! Those, Contents On The Electric Bell, Seems Well To Understand, Now!
On, 0:58-1:58, "1840, Oxford, Professor, Robert Walker, Bought A Contraption With Two Sulfur Covered Cyclinders Attached To Bells!" Amazing, Clue Findings, Though!
On, 1:51- "Layers Of Discs-Stacked On Top Of Each Other With Silfur Cealing Everything, In! Zinc Sulfate, Covered On One Side And Maganese Dioxide On The Other!" I Sure Love, That Battery, For Sure! I Hope Scientist, Open Up That Cyclinder, Soon! So, People Can Get Those, Batteries!
121 2 . Reply
medexamtoolsdotcom . 2018-08-09
I still have a millennium countdown clock still in its original packaging, never changed its battery, and it's still running, the LCD is strongly contrasted. To those who don't remember, this was a gimmick clock sold in early 1999 that counted down to 2000, and then it becomes a regular clock that counts forward. Well, it turns out that the apparently cheap seeming clock is actually a REALLY good clock, and it uses a really good battery. And it's not too far off either. It is currently 8-09-18 at 1:26 AM central time, and the clock displays 8-09-18 at 1:12 AM (it was bought in central time). In other words, after 19 years, it is a total of 14 minutes slow.
121 2 . Reply
Dragma's Animation . 2018-08-07
The battery is totally a perpetual motion machine, even though that's impossible.
121 2 . Reply
Femotions . 2018-08-06
When he said “we’ll all be dead!” I felt that
121 2 . Reply
uniseine . 2018-08-02
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killerthunder15 . 2018-07-27
do we need to do an autopsy on the battery??? dont we have imaging technology that could see inside the device? it would be even better than dissection for fear of destroying the battery in some unidentifiable way
121 2 . Reply
WilliJ Gaming . 2018-07-27
0:31 made me laugh like a duck and fall out of my house.
121 2 . Reply
Vad L . 2018-07-25
177 Years is way to long, its bad, cause you wouldnt see the result but you want to have fun right?
121 2 . Reply
Annie Jones . 2018-07-23
We'll all be dead!
-Hank Green
121 2 . Reply
The Rickiest James . 2018-07-20
The Electric Bell: SCP Object Class - Safe
121 2 . Reply
apple54345 . 2018-07-20
5:44 "the ninth drop though fell in 2014 and it was caught on camera" proceeds to not show the video.
121 2 . Reply
SomeDudeOnline . 2018-07-18
#1 Humanity
121 2 . Reply