Geography

Earth's crust

Earth’s first example of recycling — its own crust!

Rock samples from northeastern Canada retain chemical signals that help explain what Earth's crust was like more than 4 billion years ago, reveals new...
Parts of the Earth's original crust remain in place today

Parts of the Earth’s original crust still remain in place today

Analysis of rock samples harvested from the Canadian Shield suggests the samples contain components of Earth's crust that existed more than 4.2 billion year...
Is spring getting longer?

Is spring getting longer?

With the first day of spring around the corner, temperatures are beginning to rise, ice is melting, and the world around us is starting...
Recovery after 'great dying' was slowed by more extinctions

Recovery after ‘great dying’ was slowed by more extinctions

Researchers studying marine fossil beds in Italy have found that the world's worst mass extinction was followed by two other extinction events, a conclusion...
Dental plaque DNA shows Neandertals used ‘Aspirin’

Dental plaque DNA shows Neandertals used ‘Aspirin’

Ancient DNA found in the dental plaque of Neandertals – our nearest extinct relative – has provided remarkable new insights into their behavior, diet...
Looking for ‘fingerprints’ at the intersection of weather and climate

Looking for ‘fingerprints’ at the intersection of weather and climate

Scientists have found the seasonal "fingerprints" of Arctic sea ice, El Nino, and other climate phenomena in a new study that probes the global...
400,000-year-old fossil human cranium is oldest ever found in Portugal

400,000-year-old fossil human cranium is oldest ever found in Portugal

A large international research team has found the oldest fossil human cranium in Portugal, marking an important contribution to knowledge of human evolution during...
Early Earth had a hazy, methane-filled atmosphere

Early Earth had a hazy, methane-filled atmosphere

More than 2.4 billion years ago, Earth's atmosphere was inhospitable, filled with toxic gases that drove wildly fluctuating surface temperatures. Understanding how today's world of...
A scientist and a supercomputer re-create a tornado

A scientist and a supercomputer re-create a tornado

With tornado season fast approaching or already underway in vulnerable states throughout the U.S., new supercomputer simulations are giving meteorologists unprecedented insight into the...
A perfect storm of fire and ice may have led to snowball Earth

A perfect storm of fire and ice may have led to snowball Earth

What caused the largest glaciation event in Earth's history, known as 'snowball Earth'? Geologists and climate scientists have been searching for the answer for years...