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- เผยแพร่เมื่อ 14 ธ.ค. 2024
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Asteroid strikes get all the coverage, but "Medea Hypothesis" author Peter Ward argues that most of Earth's mass extinctions were caused by lowly bacteria. The culprit, a poison called hydrogen sulfide, may have an interesting application in medicine.
Talk by Peter Ward.
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2013 Top Ted Talk Nominee
The goldilocks zone is the distance from a star at which water can exist as a liquid as it is the right temperature. Current understanding is that where you find water you may find life.
The fermi paradox is the notion that there must be many many planets in this goldilocks zone in the universe. Some of these planets will be much older than ours. If this is the case - why hasn't other life come to visit us? That's it in a nutshell.
Hope this helps.
That's one of the possibilities outlined in the paradox. I'm not making any claims about the soundness of the paradox, I just thought I'd explain it to the gentlemen.
You're right though, it's a strong possibility.
when he mentions his career as an archaeologist being outdated by ''biomarking'' it reminds me of what laboratories can do with full genomic databanks and some fertile ovaries, can far outstrip what the social lifeforms biological and reproductive abilities can mix efficiently.
This is scarier than any horror movie I've watched
I believe if we can collect the photons that left the earth in the past that were deflected by the nearest black hole we can have a low quality picture of the earth in the past.
Another great TedEd!
Funny how yt recommended me this right after 2020...
I'm not very well educated on the whole H2S THING, but it seems very interesting from what he's said.
Conceptualman Let's say your right, and the temp. was raising, before CO2 levels were raising. But, INCREASING CO2, decreases the temp how???
That would be more to do with the winds on the earth and if clouds could get to the antarctica. Snow needs cold enough weather so that it doesn't turn in to water but enough evaperation to build up weight in the clouds that the clouds get cold enough for the ice to fall and enough heat so that it's turned from hail to snow. And not to water. Basically it needs to be more cold than warm. The weather cycles are also messed up lately. Snow now falls in January over december.
And trump blaming it on china so he doesnt have to waste money
Two things
1: Mass extinctions preluded by CO2 declines
2: If there's a mass extinction, i want their names, all the species taxonomic names
Eller en sånn forsker, som vi lik å kall d på norsk
Blessing and curse indeed. Interesting video... Thanks TED :)
Maybe there once was a technological civilization on Venus which then perished when it caused runaway Venus warming.
Maybe they seeded this planet.
Simple mathematics, especially given the rise in the average standard of living since the industrial revolution.
A single human will exhale about 1kg a day, a car would need to travel close to 24miles to produce 1kg. Not every human has a car, but they all exhale c02. Those who may own a car, only a percentage would drive more than 24miles a day. I have not worked out that percentage, but it could easily be done. The point being that if we all stopped breathing, we Would reduce c02 levels.
Why does he say we will hit CO2 down to 10 ppm. That just comes out of no where. WHy would that happen?
gus bisbal Geological processes bind co2 into rock and remove it from the atmosphere with time. It takes millions of years though.
Does anyone know where is Professor Peter Ward now?
He has appeared on Nate Hagens' podcast, The Great Simplification on YT.
He and other scientists talk about the state of the global oceans, likely given @ 2018 (ish)
I never knew that mammals had evolved before dinosaurs! I knew mammals lived during the times of dinosaurs but i had assumed reptiles, or "dinosaur" type animals were the first to evolve. But I didn't know that large mammals had evolved before dinosaurs. Schools should give more emphasis on those other eras and other mass extinction events. Its seem to be a common thing on Earth. A cycle of birth and death. So i guess its possible for dinosaur like creatures could evolve further in the future...
? Who are you responding to with those questions? Of course Earth's atmosphere has been hotter, and had a higher CO2 content. Normally when it increases, though, plant life grows and balances out the process, over the geologic time scale. The problem is we are simultaneously mining carbon, sticking it in the atmosphere, and reducing the planet's ability to absorb it. Unless you're talking about a gas that is actually inert, not CO2. Then I'm just confused.
nice video
Oh you mean the country with the second highest public acceptance of anthropological global warming in the world? Not that it means anything.
Also, you realize that to get a snow water first needs to evaporate, which needs heat. Snowfalls in Antarctica for example are extremely rare.
Interesting about the cold-blooded survivors
My questions where to show a point to the person calling others apes.
Thanks for talking the time answering the obvious questions, not that I actually needed the answers.
Looks like we will have to stop exhaling if you are correct, as we are unlikely to stop cutting the trees or supporting the industries that exacerbate the problem. The cows have clearly stopped farting as methane levels have steadied out over the last few years. :P
if you could get out past the front of the wave front that happened last week or last year ..yeah you could do that...
"Hey, this is how you are going to die and this is what is going to happen to all of your descendants." Thanks, I am going to have to really try to pay attention in class today because everything I do seems so trivial. I am going back to my bubble.
You can measure it with a thermometer ? Care to tell me how much your thermometer has risen since 1998 ?
it may be the very small, like bacteria, or insects or even something like interne t intelligence, or nano mites-bots.
without humans as predators or as the prey. no more ecosystem for their real, and existential angst.
three minutes in and I'm trying to get ANY POINT...the Goldilocks zone, Fermi paradox? Nice graph at 7:50 anyway...
Brilliant
What makes you think they haven't ? If you knew how to traverse spacetime or dimension would you want to present yourself to something so vile as humanity ? I think not !
Now we know what mass extinctions smell like...
When it comes to science and scientific data, you don't go out on a limb and guess that something is the way it is; instead, you observe and accumulate enough information and measurements via observations and experiments. These experiments have to be replicable and the results must match, otherwise you're going out of the field of logic and you enter the field of intuitive belief. Your claims are parallel to the anti-scientific claims of the creationist "community".
wow....mind blown
My point is that it's definatly been more cold than warm lately. And england has had the coldest winter in a LONG time.
Cool video. I wonder what will be the end of humanity. Which event will wipe us out first?
Reptillian Shapeshifters
and perhaps get wiped out and allow mammals to rule over the land again. Now I am curiously wondering if we are truly the first intelligent life on Earth...
Anyways, as always, a great video from TedEd!
I heard it said once that the fossil record is so incomplete that if dinosaurs had evolved to become a space-mining species and accidentally sent the meteorite into the planet themselves, we wouldn’t know.
It’s difficult to comprehend deep time, and juxtaposed with the incredibly rare chance that a fossil is firstly preserved, then not cooked or crushed, then pushed conveniently to the surface without being eroded or underwater.. it blows the mind.
Humans should just start taking care of some other lifeforms, and bringing some new plants into the world, and returning some animal species(to make up for a lot of what our ancestors did) and just slow up on our excessive need to reproduce ourselves, when we have so much to do and learn and wack off to right now, on this world.it's like, once upon a time, humans had a right to be afraid, cause they were a minority,among earth's animals, not anymore.
Blessing and curse.
Guess the snow this year was a illusion. Think you need to think and actually LOOK AT THE LOGS OVER THE LAST 4000 years. Go to Japan and ask them what they think.
Henry Rollins professor twin.
And TED kicked out Graham Hancock, I wonder who on earth is in charge of TED ???
ILY
I come here after watching VSAUCE and still thinking about aliens....
no I'd say you act like you are probably around 2nd grade, or are you saying you are in first grade?
He won't die poor will he. Its easy to put together the worse weather so idiots can gasp at what's happening but you can also put together how beautiful the world still it, its oranges and apples eh
This guy is a bit all over the place in his talk. interesting stuff though.
I couldn't get any of what he said... he just rambled about stuff :P
C-Man, this may help, if you can invest about ten minutes:
Go to "greenman3610" and look for "The Temperature leads CO2 Crock"...'bout ten minuites.
Asteroids need to recognize! We don't need a catastrophe from space, Byatch! We have Obama
The trouble with co2 as a cause of the melting of the ice caps is that if you look at the data , the rise in temperature PRECEDES the rise in co2 rather than following it . How can someone come so close to the truth then steer the conclusion to the politically acceptable assumption? Also , thumbs up if you clicked on 'show comment' THX!
The ocean heats up and at a certain point releases even more CO2.
Zombie argument. 👻
:) Maybe it is the laws of mathematics, or maybe the laws of nature and if not those it may just be laws in general that you refuse to accept?
Maybe the point I made was to decisive for your intellect, so you feel the need to resort to discrediting my person rather than the facts I state. Regardless, the idea of a Sovereign informing another that they are biased and spouting misinformation is literally allowing the lunatics to run the asylum. I stopped breathing, but could not stop starting.
yes that is what they are all right but what was the topic? what is the point of the whole first 3 minutes....it's like a bad joke you have to explain...
Do you not believe in Lyme disease either?
what....
haha same here!
Vsauce...
*x files here*
are you high? always... i dont know how to respond to ur comments cuz they have litterly NOTHING to do with what i said..
Sounds like bollocks in order dumb people down.
So what does that change about my statement? You are not an ape my friend, apparently you are a single celled organism. Even if we are not he cause of the global warming since the 1800s and it is just the cycle of the ice age it is STILL GLOBAL and it is getting WARMER, thus global warming.
Once they find Jesus T-Rex bones all these theories will be proven false! Glory!
I L Vsauce...:)
first?