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Tiny Pieces of Time
Topic: Geology
03/06/08
Summary: Three-billion-year-old microcrystals are teaching scientists about planetary evolution and the processes that formed the continents of Earth. The crystals are incredibly resistant to change, and contain geological 'records' of their movements through and around the planet.

Calcium Carbonate Fingerprints
Topic: Geology
01/24/08
Summary: Researchers studying microbes in hot springs have made a surprising discovery about the geological record of life and the environment of Earth. The discovery may even affect how scientists search for evidence of life on other planets.

A History of Starts and Stops
Topic: Geology
01/10/08
Summary: Scientists have found that plate tectonics on Earth may have ground to a halt in our planet's past - and may do so again. Plate tectonics are responsible for creating geologic features like mountains and ocean basins, and play an important role in maintaining Earth's climate.

The Mystery of the Missing Matter
Topic: Geology
12/08/07
Summary: A new theory may explain why the composition of Earth's mantle differs from that of chondrite -the material from which the Earth was originally formed. The theory may help us understand the formation and evolution of our planet.

A Breathable Earth
Topic: Geology
11/01/07
Summary: Geologists have determined when Earth may have first supported an oxygen-rich atmosphere similar to that of today. The study provides clues about how life on Earth has evolved alongside our planet's changing climate.

Earth's Life-Giving Rocks
Topic: Geology
10/02/07
Summary: If minerals deep in the Earth's mantle were not able to store oxygen, there might not be life on our planet's surface. New research results provide insight into how the subsurface of our planet helps maintain the Earth's habitability.

A Volcanic Switch
Topic: Geology
09/13/07
Summary: A switch from predominantly undersea volcanoes to a mix of undersea and terrestrial ones may have helped to increase oxygen levels in the ancient Earth's atmosphere. This increase allowed for the evolution of complex oxygen-breathing organisms.

Different at the Core
Topic: Geology
07/01/07
Summary: Silicon isotopes from the Earth, meteorites and planetary material have shown that the Earth's core may have formed differently than that of Mars. Additionally, the data shows that atoms of silicon from the Earth and Moon were likely mixed in the early stages of their development. The research points to important clues about the history of the Earth's environment.

The Dreadful Hammers of Jules Verne
Topic: Geology
06/07/07
Summary: In the nineteenth century, the new science of geology was greatly affected by technological innovations. From Astrobiology Magazine, European Edition is an essay about how Jules Verne used his novels, such as "Journey to the Centre of the Earth," to explore the latest geological findings.

Building a Habitable Earth
Topic: Geology
05/31/07
Summary: To understand the origin of life we need to know about the conditions on the early Earth, but the rock record for the first 700 million years of Earth history is gone. From Astrobiology Magazine, European Edition is a story about techniques scientists are using to peer farther back in time.

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