Billion-dollar disasters in US in 2011 so far

Disasters such as snowstorms, tornadoes, flooding and droughts in 2011 have affected millions and cost billions. Here's the list so far.

Agave featured on Lifeform of the Week

Sobriety? Energy crises? Whatever the problem, agave can lend a prickly hand.

NASA confirms Earth isn’t expanding

The average change in Earth's radius is 0.004 inches per year, or about the thickness of a human hair, a rate considered statistically insignificant.

Fukushima reactor radiation release calculated

Measuring radioactive sulfur in California let researchers calculate how much radiation released from Fukushima reactors. Read more.

Indiana State Fair tragedy and heeding weather warnings

Can we use the Indiana State Fair tragedy to learn from our mistakes? Read more about the incident and weather conditions here.

Ben Horton: Sea level rise faster now than in 2,000 years

A team has direct physical evidence - microscopic fossils from a North Carolina salt marsh - that sea level rise is faster now than in the past 2,000 years.

2011 Gulf of Mexico dead zone smaller than scientists predicted

Tropical Storm Don might have disrupted the Gulf of Mexico dead zone in the summer of 2011, making it smaller than scientists originally predicted.

Typhoon Muifa: A photographer’s perspective

See dramatic images of Typhoon Muifa - 9th named storm of the 2011 Pacific typhoon season - as it struck Okinawa, Japan on August 5.

Fish success story in Baja, Mexico, but development looms

At an undersea park in Baja, Mexico, the fish population rebounded by 460 percent in 10 years. Developers now want to build a resort a few miles north.

After quiet week, tropics in Atlantic Ocean becoming active

Here in mid-August 2011, the tropics in the Atlantic Ocean are now heating up and models are showing development of numerous storms.