Radiation exposure fears appear to have led to a run on iodine tablets in the US. But federal officals say that is an overreaction. They say weather patterns would disperse radiation from Japan to the point that it would present no health risk by the time it hits American shores.
Thanks to the latest technology, Tokyo received early warning of the Japan earthquake. But tsunamis require more time to prepare for, so scientists are investigating ways to speed up computer alerts without sacrificing accuracy.
Flames rise from houses and debris half submerged by a tsunami in Sendai, Miyagi Prefecture, on March 11.
Runoff from unusual snowfall in Alabama caused water temperatures in Mobile Bay to drop suddenly, possibly leading to stillbirths of baby dolphins, researchers say. Poisoning as a result last year's oil spill is another possible culprit.
Members of Brunei's armed forces march past the royal dais during the 27th celebration of Brunei National Day in Bandar Seri Begawan.
Geomagnetic storm: A true monster storm has the potential to wreak havoc on a global scale, knocking out communications systems, endangering satellites and astronauts and causing perhaps trillions of dollars in damages.
The Bassmaster Classic 2011 is the most prestigious bass-fishing event in the world, drawing 50 top fishermen to New Orleans in the wake of the BP oil spill. Oil is a nonfactor, organizers say.
Solar flare: A massive blast of charged particles ejected from the sun Monday has triggered a geomagnetic storm that is disrupting radio communications.
Authors say a study that looked at the rise in extreme rain and snowfall in the Northern Hemisphere in the last half of the 20th century is the first to show a link to global warming.
Solar flare - one of the biggest in four years - shot from the sun on Sunday. Scientists predict that a solar flare of this size - and traveling toward Earth - could produce a dramatic light show. Did it?