Dawn of complex life A History of Infection #1

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Welcome to the first of many in a series of videos looking at how infections and pathogens have changed human history and what it means to be a pathogen!

This part looks at one of the earliest cases of a possible infection and one of the main transitions of life on this plant.

I’ve had to cut a lot of of this due to time and pacing but If you want to see a companion video to this with far greater biological details just let me know!

If you like these you might also like my writing on the subject which can be found here


mitzvah golem says:

Excellent work Thanks

ayyvan whayylan says:

So basically life uh, finds a way

JimmyStiffFingers says:

Mitochondria are the powerhouse of the cell.

Michaela Owsley says:

Science is so sexy, i wish i was good at it, i love learning about it though so thank you so much Jim!!

deadasfak says:

Damn I'm so interested in early life. How and why it changed into the life we're more familiar today

joe worm says:

Thanks! Also, I love your channel! I found you through Myles Power and Shed Science when they posted on Facebook about your collaborative video about Hank Green's redacted video on GMOs. ( … that was a mouthful of a sentence)

JimTheEvo says:

sure can, but in the mean time I was referring to Thiomargarita namibiensis.

joe worm says:

@1:03 you mention the largest bacteria known but a caption on the screen says you're unable to pronounce it. Can you add an annotation giving the name of the bacteria so viewers can see what specific bacteria you're talking about?

Cathy xxx says:

This is fantastic, thank you. I love the suggestion of an expanded series to complement this one. Did chloroplasts get included in the same way as mitochondria, was it around the same time? Does the potential change over the mitochondrial wall in the same way as eukaryotes? Do bacteria create ATP the same way? You have to tell us about those mitochondria-less eukaryotes, that was a cruel tease to mention them …or maybe I'll take it as a challenge to read more. Looking forward to the next one

Ketone-Kun says:

Since evolution only cares about the replication of the genome, surely that should be what we consider the defining trait of living things? I understand why you would value homeostasis so highly but viruses, obligate parasitic bacteria and mitochondria show this isn't needed to be fit. It's just a matter of perspective and you're free to view it either way, I just don't see it being very consistent to put homeostasis on such a pedestal when replication seems the only consistent thing about life

Ketone-Kun says:

You can always rewind you know

JimTheEvo says:

You are quite right I've tried to slow down in the later episodes.

nash984954 says:

Thnx for that, it makes sense. I believe they're also losing habitat, just as mudfish are, due to urban sprawl and human neighborhood developments.Makes me sad, too. There's a ferocious fish in the Great Lakes that's been introduced and native fish are more docile and are getting wiped out.

manthasagittarius1 says:

It's the same thing. I've heard them called mudfish. If I'm not mistaken, axolotls are the juvenile form of a kind of Mexican salamander; or maybe it's the fact that they don't undergo any metamorphosis into the adult form, but just jump from being kids to reproducing, kind of like teenagers.
I have read that they are being wiped out by species that have been introduced into their habitat, which are eating their food supply and even their young. Very sad.

nash984954 says:

I'm so ignorant, but are axolotls, water dragons, or is a water dragon an axolotl? I thought that image on his page was just a mud fish. I'm so dumb. I guess I should've just googled, but here I am. :-)

nash984954 says:

Hi, Jim, Claire sent me&I'm so glad she did,I subbed…oh&a companion video? Count me in. Claire's Geology mentions in her videos has helped me be more aware of topics on Geology I come across&I can see the same happening with you&Biology.You're a great spokesperson. Coincidentally, I've been pouring over a somewhat dated Biology textbook, 6th ed of "Life" by William K Purves&3 other authors.It is pre-genome project, but I'm sure the basics haven't changed too awful much.You can update me.:-)

Peter Hockley says:

As usual a great recommendation from Claire! Thanks for the understandable explanation of how we acquired Mitochondria.

Jonny Angel says:

Claire sent me. Great video!

Evolution Rocks says:

hi there, another refugee sent from Claire lol, loved the video and it is an area that is consistently overlooked in YouTube land. If you ever need any help on paleobiology message me and I will be happy to help as that is my area of expertise.

you are also a fellow Brit which means we are keeping the side up for reason, logic and good science

christo930 says:

Great video, looking forward to watching more (subbed). Yes, Claire sent me!

rationalmuscle says:

Jim, good stuff. Curious as to your take on ERVs and their genomic placement (i.e. curiously exact with common ancestors. 😉 These little guys have always been intriguing to me.

JimTheEvo says:

Yer it's very kind of her! The subs have been rolling all day with some very nice comments too!

John Broadhurst says:

I am so very please Claire's giving you a shout out you are grossly undersub'd I am sure you will already be noticing an increase in your sub's

manthasagittarius1 says:

Wow, he's got an axolotl on his main page! That does it — this is a keeper to subscribe to.

manthasagittarius1 says:

What a completely fascinating bunch of stuff! And nice presentations too. I'll drink to this, and sub to it too.
Thanks, Claire!

Nai61a says:

There's a solved Rubik's Cube there, too, which is showing off on multiple levels.

Nai61a says:

And if it's good enough for Claire, it's good enough for me (and goodness knows how many others) … Seriously though … I like it; subscribed.

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