Many foreigners asked about the well-being of their Japanese friends, even if their friends were based in Okinawa or Fukuoka, several hundreds of miles from the dangerous quake zone.

FORBES: The Great Eastern Japan Earthquake and Social Networking in Japan

The question Hansen raises is direct and brutal in its implications: is the planet already entering a zone of dangerous climate change?

FORBES: Breaking News: The Climate Actually Changes!

Flight 447 was passing through an area prone to volatile and dangerous weather known as the Inter-tropical Convergence Zone when it went down.

CNN: STORY HIGHLIGHTS

The most dangerous stretch came when the Rangers were pinned in their own zone and couldn't get a line change.

WSJ: Girardi's OT goal lifts Rangers over Islanders

One Blackwater operative told a reporter on a flight home from the Middle East that he had served as a bodyguard, escorting American personnel along the extremely dangerous road from Baghdad's airport to the fortified Green Zone downtown.

FORBES: Magazine Article

On May 7th, euro-zone leaders met in Brussels to consider a less tangible but more dangerous threat to Ireland's limping economy: Europe's sovereign-debt crisis.

ECONOMIST: Ireland's economy

As leaders trickled into the European Union's boxy headquarters, Ms. Merkel faced a challenge to placate the euro zone's south, which thought private-sector involvement was dangerous, and its north, which thought it didn't go far enough.

WSJ: European Disunion: Dithering at the Top Turned EU Crisis to Global Threat

But the idea that the euro zone can pool debt without a clear agreement on political union is a dangerous illusion.

WSJ: France Is Biggest Obstacle to Solution