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Figure 1. I believe the theory is that all of us have some DNA from her. And then if we fast forward all the way to the Declaration of Independence, this would have occurred five seconds ago. Thanks!


We don't really have any sense of time. And modern humans wouldn’t have shown up until 80 minutes ago, 80 minutes, a little over an hour. And if we pretend that it occurred 10 years ago, let’s think about how many years, or minutes, or hours ago each of these events would have occurred. And you fast forward some more and you actually have the first modern humans appearing on the planet, people that looked and thought like you and me.
And so when we associate kind of a lot of modern history occurring after his birth.

So these are all events or periods of time that we’ve heard about and we’ve talked about. But in my mind, this is still pretty amazing. Then the universe was 10 years, it didn’t take until just very recently, the last hour, for us to see someone that looks something like us, looks and thinks something like us. So this isn’t quite as mind blowing as the scale of the universe. It’s a very, very long period of time. Video is embedded from external source so download is not available Scale factor versus cosmological time (right-hand panel). Channels: So just to start off, I have here– this is the best depiction I could find where it didn’t have copyrights. This is a significant fraction of the age of the universe. A scaled timeline points out periods of times that are relevant to us since the Big Bang. This is what we think the asteroid that killed the dinosaurs looked like when it was impacting Earth.

But this is a depiction of a modern human, so 200,000 years ago. Video is embedded from external source so embedding is not available. The following video will tell you about Cosmological time scale 1 Scale of the universe . At about 3 million years ago– let me do this in a color that you can see– about 3 million, so three million years ago, our ancestors look like this. This is I think a depiction of– this is Lucy. Open in new tab Download slide. This is 200,000 years ago. And people throw around these type of years. So instead of the Big Bang occurring 13.7 billion years ago, let’s pretend like it occurred 10 years ago. So this is 234 years ago. the universe began around 13.7 billion years ago Start at 0KM Declaration of Independence 234 years ago 1CM to end Our This Cosmological Time Scale 1 Video is suitable for 9th - 12th Grade. And so this right here is 4.5 billion years ago.

You can use 7 billion years is. Actually even on a worldwide basis, it was the first secular democracy based on a kind of a constitutional democracy that showed up on the planet. And it gets even crazier. No content is added to this lecture. 17 days ago, the dinosaurs would have extinct. So just to start off, I have here– this is the best depiction I could find where it didn’t have copyrights. What I’ve done here is I’ve copied and pasted a bunch of pictures that signify events in our history, when you think about history on a grander scale, that most of us have some relation to or we kind of have heard it talked about a little bit. That’s right over here. And I’ve talked about it several times. So if Big Bang, which is really 13.7 billion years, if it really had occurred 10 years ago, and we scaled everything down, if we had scaled everything down, then the Earth would have been created about 3.3 years ago. But if we go all the way to when the dinosaurs were extinct, the last land dinosaurs, now the 65 million years– and this will give you an appreciation of the difference between million and billion– if the universe was only 10 years old, then the dinosaurs would have been extinct 17 days ago. This is Australopithecus afarensis. Right click on the image below and then select "Save image as" option to save the image for your powerpoint presentations. Because most of us, especially if you’re over the age of 10, can kind of understand what 10 years is. In the next video, instead of condensing things in time, I’m going to compare this scale to kind of a distance scale. So if the universe was created when I was just graduated– well, I’m in my ’30s now, so when I was 24– just last month, the dinosaurs would have gone extinct. Cosmological time scale 1 Scale of the universe . They said we don’t want the king of England anymore.