And Darwin kept these copious notebooks where he wrote down every little idea he had, every little hunch.

We had to arrange the spaces so that they stacked on top of each other without needing to hunch down.

... give people more information and follow your hunch TED.

Tom had a hunch that Mary was seeing someone else.

I've learned to follow the hunch, but never assume where it will go.

And just because of someone's hunch, I wasn't going to give it up.

Chris Anderson Do you have a hunch or a hope for what the answer to that is?

Now a couple of companies like Google they have innovation time off, 20 percent time, where, in a sense, those are hunch cultivating mechanisms in an organization.

News accounts depict hordes of emotional people trading on hunch and superstition. That looks a lot more like reality than all the talk of impending financial singularity.

But in fact, if you go back and look at the historical record, it turns out that a lot of important ideas have very long incubation periods I call this the slow hunch.

We've heard a lot recently about hunch and instinct and blink like sudden moments of clarity, but in fact, a lot of great ideas linger on, sometimes for decades, in the back of people's minds.

People often credit their ideas to individual Eureka! moments. But Steven Johnson shows how history tells a different story. His fascinating tour takes us from the liquid networks of London's coffee houses to Charles Darwin's long, slow hunch to today's high velocity web.

I mean, here you have these guys who basically thought they were just following this hunch, this little passion that had developed, then they thought they were fighting the Cold War, and then it turns out they're just helping somebody find a soy latte.

And one of the things that you see is that male line, the mortality is going down, down, down, down, down.

Man down! Man down!

They run some more of the numbers, and at the end of about three or four weeks, turns out they have mapped the exact trajectory of this satellite around the Earth, just from listening to this one little signal, going off on this little side hunch that they'd been inspired to do over lunch one morning.

Gradually, bringing it down, bringing it down.

Unemployment up. Housing values down. Equity markets down.

The drop in the spot price of oil has taken it significantly below the five year forward price, which remains close to 80 per barrel. My hunch for 2015 is that oil prices may continue to drop in the short term unlike in the past four years, however, they are likely to finish the year higher than they were when it began.

Soldiers Sergeant Smith is down! Sergeant Smith is down?

Evelyn He ordered us to sit down, so we sat down.

We go back down. It's going to go up and down.

And down here, and they winter down here in southern Africa .

That We pour down the water, pouring (it) down in abundance,

That We pour down the water, pouring (it) down in abundance,

He reached down. He pulled a lever. And the chair sank down.

See, Uganda coming down, Zimbabwe coming down, Russia went to one percent.

Surely We have sent down the Koran on thee, a sending down

Surely We have sent down the Koran on thee, a sending down

When it is said unto them Bow down, they bow not down!

When it is said unto them Bow down, they bow not down!

When they are bidden to bow down, they do not bow down.

When they are bidden to bow down, they do not bow down.

Get down!

Quiet down.

Quieten down!

Stay down!

Slow down.

Bow down!

You can see muscles pulling down at flesh to bring her eyebrows down.

And as you go down, the washing machine at the surface calms down.

Do you send it down from the clouds, or We send it down?

Do you send it down from the clouds, or We send it down?

Send it down ye from the raincloud, or are We the Sender down?

And when it is said Unto them 'bow down, they bow not down.