You all know this story.

(Laughter)

And the answer is about half a second.

What is life? What is this stuff of life?

And then of course, I blame the Soviet Union.

Now why would you use rats?

ELA You can get at some pretty abstract concepts with this sort of thing.

(Laughter)

And what has happened in the world?

Let me explain.

And now I know I am completely competent.

Transportation walls came tumbling down.

Then I was there. Kim...

They had been giving so much their entire lives.

I think it's helpful to give a little bit of history about how compilers and interpreters were first developed.

They couldn't stop talking about all the things they did in 1950, all the things they were planning to do in 1950, all the dreams of what they wanted to accomplish in 1950.

(Laughter) And now I know I am completely competent.

This is a photograph by Franz Hueber.

Natural gas is often found alongside oil and coal.

It's apparently, I don't know, on the record somewhere.

I'll use these sidewalks in Rio as an example.

We all know little bits, but none of us knows the whole.

It's from trophy fish caught off the coast of Florida.

(We'll go into more detail when we do detailed videos about the Korean War)

Stop signs were invented in 1915, yield signs in 1950.

And so the 1950's came.

I started reading about the history and the geography in New York City.

The bedrooms were cold. They were unheated.

It lists every known mental disorder.

There has not been a decade of television without a definitive, dominant TV mom.

You can see how it's tilted at about 89 degrees.

But why don't we see any evidence of it?

Here's what's happening in the world.

And then we had the electric washing machine.

And we're moving in a full circle now.

I want to start by showing you a rudimentary, very simple magic trick.

And they tasted really good.

Suddenly, in the mid 40s, there started to be a buzz.

Typically it takes 40 years after the peak of discovery for a country to reach its peak of production, after which it enters a permanent fall.

I was involved in setting aside marvelous areas as future national parks.

But even if you toss a few numbers around, you're probably talking an effective population of about 20,000 animals.

Babbage used the technology of the day and the technology that would reappear in the '50s, '60s and '70s, which is punch cards.

We have identified over 400 species of bees in Pennsylvania.

This was originally seen as a system that was the pleasure system of the brain.

I should say that the age of bristlecones was discovered, led by a theory.