All Stories by Sid Perkins
- Earth
A near-record Arctic melting
This summer, the area covered by Arctic sea ice dropped to its second-lowest since satellite measurements began in 1979.
- Earth
Sea-level history off the ice
For the first time, researchers have assembled a comprehensive record of how sea level varied between 542 million and 251 million years ago, more than doubling previous timelines for such fluctuations.
- Earth
Tough meteorite made a big impact
The stony meteorite that landed in a remote portion of Peru in September 2007 was traveling abnormally fast when it struck and blasted a crater that was unusually large for the its size, new analyses indicate.
- Earth
New contender for Earth’s oldest rocks
Observing rare isotopes in rocks along the Hudson Bay in Northern Quebec suggest the rocks have remained intact for 4.28 billion years, making them Earth's oldest.
- Earth
Continental clash cooled the climate
The collision between India and Asia set off events that caused long-term cooling in Earth’s climate, new research suggests.
- Climate
Heat waves stunt grassland growth
An abnormally hot year can significantly suppress growth in grasslands, a stifling effect that lingers well into the next year even if temperatures return to normal. It can also hinder how well the grasslands absorb carbon dioxide from the atmosphere.
- Earth
Don’t blame the cities
Urban sprawl is sometimes blamed for skewing weather data and creating a false signal of global warming, but a new study suggests this idea is just a lot of hot air.
- Earth
Mighty hurricanes get mightier
Peak winds in North Atlantic hurricanes and similar storms elsewhere in the world have gained speed during the past three decades, thanks to a warming trend in many of the ocean basins where such storms are spawned.
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- Earth
Past gasps
Earth’s atmosphere during some past geological ages wasn’t as oxygen-deprived as previously thought, new experiments suggest.
- Life
Compass creatures
Herds of grazing and resting deer and cattle tend to align themselves with the Earth’s magnetic field, a hint that the large mammals can somehow sense the invisible field.
- Earth
Firm evidence that Earth’s core is solid
Faint yet distinct ground motions recorded by a large network of seismic instruments in Japan in early 2006 are the strongest, most direct evidence that Earth’s inner core is solid.
