I don't know, saying,

And so from this we're able to identify these blue highways, these hot spots in the ocean, that should be real priority areas for ocean conservation.

Living amongst our tunas our North American tunas are European tunas that go back to the Med.

We are at a highway rest stop halfway between Tokyo and Fukushima, and we are looking for the kind of hotspot you would just as soon avoid.

But the story of Africa, and my focus, is beyond South Africa because there's so much happening.

bjbjLULU JEFFREY BROWN Now, tracking the spread of radiation in Japan eight months after the tsunami caused a nuclear accident. Japanese people are using new technology and the power of crowdsourcing to find hotspots.

So what we're able to do with this information is boil it down to hot spots, 4,000 deployments, a huge herculean task, 2,000 tags in an area, shown here for the first time, off the California coast, that appears to be a gathering place.

But I will tell you some of my favorite discoveries from the census.

We hope you're going to absolutely love it.

They look at their entire genomes, and they try to find hot spots of activity that are linked causally to genes.

And it's that balance between burglars and security which create these dynamic hot spots of the city.

And the exciting thing is that we do have sufficient information to move ahead to protect some of these significant hope spots, hotspots.

It's this non tracking collector with these six tuba like horns, and each of them collect light in the following way if the sunlight strikes right here, it might bounce right to the center, the hot spot, directly, but if the sun is off axis and comes from the side, it might hit two places and take two bounces.

NewsHour science correspondent Miles O'Brien has the second in a series of stories from Japan.

Imagine if you had an ordinary cell phone, and any time you were in a wireless hotspot free calls anywhere in the world, never pay the cellular company a nickel.