Earth
- Climate
Weather patterns over Southern Hemisphere have a regular pulse
Variations in energy and rainfall over the Southern Hemisphere follow a pattern that repeats every 20 to 30 days.
- Earth
Ammonite jaws provide a window into ancient climate
Temperature of marine environment can be determined from cephalopod fossils.
- Ecosystems
Amazon doesn’t actually go green in dry seasons
An optical illusion in satellite data made forests appear to grow faster.
- Earth
Eye in the sky
With its free Images of Change iPad app and online gallery, NASA makes the aerial perspective available to all, with results both stunning and disturbing.
- Earth
Eighth century carbon spike not from comet impact
The space rock would have to have been 100 kilometers across and 100 billion to 1,000 billion tons, leaving a disastrous impact not supported by geological or written records.
- Animals
Windows may kill up to 988 million birds a year in the United States
Single-family homes and low-rise buildings do much more damage than skyscrapers.
- Earth
Grand Canyon’s origin dated to 6 million years ago
Even though parts of the canyon are old, the chasm could not have taken on its grand form until erosion from the Colorado River connected all of the smaller canyons, which was roughly 6 million years ago, scientists argue.
- Climate
Grape expectations
Global warming has delivered long, warm growing seasons and blockbuster vintages to the world’s great wine regions. But by mid-century, excessive heat will push premium wine-making into new territory.
- Earth
Life’s early traces
Tiny tufts, rolls and crinkles in 3.5-billion-year-old rocks add to a growing body of evidence suggesting that cellular life got a relatively quick start on Earth.
- Climate
2013 among top 10 warmest years on record
Global temperatures have now been above average for 37 consecutive years.
- Agriculture
Some bioenergy crops are greener than others
In the Upper Midwest, switchgrass trumps maize at boosting ecological health.
- Agriculture
Dealing with change, climate and otherwise
Wine, DNA, our understanding of the universe: It's all changing, whether we are ready for it or not.
