Triple and quadruple rainbows in 1st-ever photos

We now have the first scientifically accepted photos of triple and quadruple rainbows. For some, it's as if we've captured a picture of a real unicorn.

Active weather for the middle of October

Meteorological models see rain ahead for dry Texas and Oklahoma and for soaked Northeast - and maybe tropical storms in Gulf and Caribbean. More active weather coming.

Arctic sea ice reached record lows in 2011

Arctic sea ice losses during 2011 were the second-greatest in the satellite record dating back to 1979, according to an official NSIDC report.

Global photosynthesis and a new calculation

Scientists led by Scripps Institution of Oceanography found forests might be taking up more atmospheric CO2 during photosynthesis than previously thought.

Genetically engineered canola grows wild across North Dakota

Large, persistent populations of genetically engineered canola are growing along roadsides throughout North Dakota, says study.

Stewardship by fire in South African park restores grassland

Newly released NASA images show good Earth stewardship - via fire - in Kruger National Park in South Africa. Read more about it here.

Using Landsat to monitor our water use from space

Monitoring our water use from space with pinpoint accuracy, even at the scale of individual fields. Read more about LandSat with Martha Anderson.

Two tornadoes strike South Africa

Two tornadoes hit parts of South Africa on October 2, 2011. At least 150 people were injured and one person dead in Duduza and Ficksburg, South Africa.

Ophelia packs powerful winds as it pushes into Newfoundland

Ophelia has now weakened from a hurricane to a tropical storm as it pushes into Newfoundland today. Its winds still pack a punch at 70 miles per hour.

2011 Arctic sea ice minimum second-lowest in satellite record

Watch for the official announcement about 2011 Arctic sea ice minimum, coming soon. Expect to hear that 2011 proved to be a year of extreme melt.