Beginnings of life | Life on earth and in the universe | Cosmology & Astronomy | Khan Academy
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Life and photosynthesis start to thrive in the Archean Eon. Created by Sal Khan. Watch the next lesson: https://www.khanacademy.org/science/cosmology-and-astronomy/life-earth-universe/history-life-earth-tutorial/v/ozone-layer-and-eukaryotes-show-up-in-the-proterozoic-eon?utm_source=YT&utm_medium=Desc&utm_campaign=cosmologystronomy Missed the previous lesson? https://www.khanacademy.org/science/cosmology-and-astronomy/life-earth-universe/history-life-earth-tutorial/v/earth-formation?utm_source=YT&utm_medium=Desc&utm_campaign=cosmologystronomy Cosmology & Astronomy on Khan Academy: The Earth is huge, but it is tiny compared to the Sun (which is super huge). But the Sun is tiny compared to the solar system which is tiny compared to the distance to the next star. Oh, did we mention that there are over 100 billion stars in our galaxy (which is about 100,000 light years in diameter) which is one of hundreds of billions of galaxies in just the observable universe (which might be infinite for all we know). Don't feel small. We find it liberating. Your everyday human stresses are nothing compared to this enormity that we are a part of. Enjoy the fact that we get to be part of this vastness! About Khan Academy: Khan Academy offers practice exercises, instructional videos, and a personalized learning dashboard that empower learners to study at their own pace in and outside of the classroom. We tackle math, science, computer programming, history, art history, economics, and more. Our math missions guide learners from kindergarten to calculus using state-of-the-art, adaptive technology that identifies strengths and learning gaps. We've also partnered with institutions like NASA, The Museum of Modern Art, The California Academy of Sciences, and MIT to offer specialized content. For free. For everyone. Forever. #YouCanLearnAnything Subscribe to Khan Academy’s Cosmology & Astronomy channel: https://www.youtube.com/channel/UChNPnEkW8LYZ5Rwi8_A2-DA?sub_confirmation=1 Subscribe to Khan Academy: https://www.youtube.com/subscription_center?add_user=khanacademy
Comments
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Also God created the Earth and life so shut up.
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Due I love this video but really, gods more like god.
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Paused at 2:12 with an objection. Didn't the late heavy bombardment primary have to do with Neptune and Uranus interacting with the once closer Kuiper belt that they plowed through as they migrated outward? That would also explain why where a lot of the water and other hydrocarbons came from.
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Great video, the narrator is funny and explains so one understands :)
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This guy talks like Ian Malcolm. I love it.
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The majority of Christians don't believe in evolution. It nice that you are a Christian and believe in evolution.
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Why even watch this video then? Just go away and don't even click on the link that sends you to this video.
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Evolution is as much a theory as gravity is., the support and evidence is massive but majority of humans are too feable minded minded to grasp it
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For all you "evolution " ape minds = how do u explain your soul (you know the voice in your head) , also this is only a theory dont start assuming Gods fake when this is only a theory and we dont need science to prove god we got history and faith and prophecy ...learn other subjects not just your evolution religion
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I think it's helpful when talking about the evolution of photosynthesis and the oxygenation event to use the term "molecular oxygen." Photosynthesis doesn't produce the element oxygen, it uses energy from the sun to split H2O and O2 forms as a byproduct; molecular oxygen, the highly reactive molecule responsible for burning sugars efficiently enough to drive complex eukaryotic life.
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I'm a Christian and I believe in God. But i Respect this theory. Please. Don't be bitchy about people that believes in God's creation. Not every believers are narrow minded. Khanacademy, thank you so much for putting effort on doing all these videos :D keep it up!
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When I download the video and send it to my PSP to watch it says 'unsupported data' but when I put biology videos from khan academy onto my PSP it works. Does anyone know the problem of this or the solution.
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To the person that posted this. If you know the poeple that developed this information I would like to know if you have considered this. in short I believe that the earth and most of it's early lifeforms were developed while the earth was not in the orbit of the sun, but developed in route. Tell me why this thought is wrong... I look forward to anyone that can, scientifically, debunk my theory
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I love how he changed the sun's color to orange so we wouldn't confuse it with the earth LOL.
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The is stromatalites, stromatalites, strooooomatalites.
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title is misleading, he talks about how life evolved, not how it formed. what is the leading theory? that a bunch of chemicals reacted to form the first prokaryotes? or were they placed here during the late heavy bombardment? of were they placed here by a creator or alien life?
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Better than my lecture. Nice layout
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interesting video and very informative
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Hades ruled all afterlife not just hell.
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Gods fake, get fucking over it. -.-
10m 26sLenght
300Rating