And these particles have been discovered over the last century, pretty much.

I'm talking about the 1990s.

This is the 1950s.

And this was in the early 1900s.

It was only by the turn of the century that more than 90 percent of the children survived their first year.

But in this century China is coming on line.

In fact in the second half of the 20th century growth was even higher than anything you would have predicted based upon the first half of the 20th century.

This animal is in The Guinness World Book of Records for being the world's heaviest bony fish.

Recently, a wise media theorist Tweeted, The 19th century culture was defined by the novel, the 20th century culture was defined by the cinema, and the culture of the 21st century will be defined by the interface.

This could be our best century ever because of the achievements, or it could be our worst.

It's not the Middle Ages anymore, it's the 21st century.

In the 1960s and 1970s, the Vietnam War was basically shown in America's living rooms day in, day out.

Only 90 days after this, arguably the greatest discovery of the last century occurred.

Those two things are the huge shifts of power in our century.

Does God demand loyalty, like any medieval tyrant?

It's a collection of nautical antiques from the 1700s and 1800s.

I'm intrigued by a concept that was brought to life in the early part of the 19th century actually, in the second decade of the 19th century by a 27 year old poet whose name was Percy Shelley.

And the miners in the early part of the last century worked, literally, in candlelight.

The Wright Brothers, in the beginning of the last century, had for the first time managed to make one of those devices fly.

You know, we've warmed the globe about a degree Centigrade in the last century, and there's nothing in the natural part of that record that resembles what we've seen in the last century.

We've actually changed the temperature in the last century just the right amount.

I grew up on the coast of England in the '70s.

It went into Time magazine in 2001 as the new language of the 21st century.

Let us not return it to the structure of the past century, of 60 years ago.

If we looked at the world in 1800, you'd find that more than half of the world's people lived in Asia and they made more than half the world's product.

It's been tried six times in the last century, and it's been successful exactly once.

It wasn't perfect, but it got us through the last century.

No. It should be Go Go Gadget!

We do expect to see a sea level rise on the order of one to two meters by the end of this century.

Many in the US feared that, just as the nineteenth century had been British and the twentieth century had been American, the twenty first century would be Japanese. But, unlike the British or the Americans, the Japanese allegedly were gaining ground in nefarious ways, exporting aggressively to the US and unfairly excluding US exports from their domestic market.

And many of our ideas have been formed, not to meet the circumstances of this century, but to cope with the circumstances of previous centuries.

It's one of the most lethal things we've seen in circulation in the world in any recent centuries.

By the middle of the nineteenth century, the world was functioning on a bi metal system based on gold and silver. But, following the British example, most major countries had shifted to a gold standard by the 1870 s.

Now, that free time existed in the 20th century, but we didn't get Ushahidi in the 20th century.

Rats have been used since the '50s last century, in all kinds of experiments.

What's the population of the Earth going to be when you're the age of your parents?

Built the Tesla coil. This tower was built on Long Island back at the beginning of the 1900s.

Emulator of the 1980s ZX Spectrum home computer and its various clones

Most estimates are that, this century, we will get at least one meter.

That was until the 1970s, where we had the last energy crisis.

But after that you have the market revolution of the 1980s.

The question is this Will twenty first century Asia resemble Europe the dominant region of much of modern history during the first half of the twentieth century, when it experienced two wars of unprecedented cost and destruction, or the second half, when tensions with the Soviet Union were effectively managed and Western Europe experienced unprecedented peace and prosperity?

Abad Baru bagi Timur Tengah

They're in The Guinness World Book of Records again for being the vertebrate growth champion of the world.

And the world's population expected to top out at something hopefully a bit less than 10 billion, late this century.