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Geotimes November 2006 Carolyn Gramling	Airing Out an Early Atmosphere Scientists have generally thought that oxygen was scarce in Earth's atmosphere until about 2.4 billion years ago. Now a study based on new evidence suggests that oxygen may actually have been around longer than previously thought.
Chemistry World July 3, 2015 Ida Emilie Steinmark	Iron found in ancient rock is recycled from bacteria Isotopic analysis suggests that some of the iron within rock formations was processed by bacteria 2.5 billion years ago
Chemistry World April 16, 2015 Tim Wogan	Early Earth collision could clear up two geological mysteries Two seemingly unconnected geology problems -- the unexpected ratio of two neodymium isotopes in terrestrial rocks and the energy source for the dynamo that creates Earth's magnetic field -- could be solved by a new theory.
Chemistry World April 9, 2009 Lewis Brindley	'Nickel famine' caused ancient oxygen rise A crucial increase in atmospheric oxygen that occurred around 2.4 billion years ago could have been triggered by a shortage of nickel in the oceans, according to Canadian researchers.
Chemistry World March 15, 2009 Lewis Brindley	Age of Photosynthesis Questioned Photosynthesis could have been flourishing on Earth nearly a billion years earlier than previously thought, according to a study by American geochemists.
Chemistry World July 21, 2010 James Urquhart	Volatile elements locked in moon rock Samples of a mineral present on the Moon and on Earth have been found to contain almost the same concentrations of hydrogen, chlorine and sulfur, adding weight to questions over how the Moon formed and evolved.
Geotimes June 2007 Kathryn Hansen	So, When Did Earth Become Attractive? Ever since Earth's protective field was discovered in 1958, scientists have been wondering when did the planet grow up and become attractive?
Geotimes October 2005 Naomi Lubick	Moon Soil, Earth Air? Apollo astronauts brought back samples of soil from the moon that contained unexpectedly high levels of nitrogen. New research is shedding light on the anomaly.
Chemistry World May 27, 2014 Robert Newton	Oxygen: a four billion year history Donald Canfield delivers his explanations with a deft hand, bringing us the evidence for oxygen's history on the Earth's surface.
Chemistry World May 28, 2014 Ian Randall	Earth's earliest continent formed like Iceland The Earth's first continents may have formed in a geological setting similar to modern-day Iceland, according to the geochemical analysis of a newly discovered rock unit from Canada.
Geotimes March 2005 Sara Pratt	Rocky Debate Over Early Life Scientists fail to replicate a 1996 study on 3.85-billion-year-old rocks that pushed back the date of the earliest evidence for life on Earth by several hundred million years.
Geotimes August 2006 Jennifer Yauck	Microbes Reshuffle Earth's Early History Previously, scientists used microfossil evidence to date the earliest eukaryotes to about 1.8 billion years old, and the earliest cyanobacteria to about 2.1 billion years old. Now, geologists present new evidence suggesting both types of organisms existed as early as 2.45 billion years ago.
Chemistry World May 13, 2014 Tim Wogan	Chemistry calculations reveal Earth's inner core Theoretical calculations have confirmed that the Earth's core contains a significant proportion of oxygen.
Geotimes November 2007 Carolyn Gramling	How Does Your Continent Grow? Data from ancient mantle rocks are helping to shore up the hypothesis that the continental crust was extracted in pulses, during periodic large melting events in the mantle.
Chemistry World July 13, 2012 Simon Hadlington	Where did Earth's water come from? One big question that remains unanswered about the evolution of the early Earth is how volatiles such as hydrogen, nitrogen and carbon arrived -- their presence being crucial to the origins of water and life.
Chemistry World August 5, 2010 Phillip Broadwith	Dry Moon discovery Was there water on the Moon when it first formed? US geochemists say the distribution of chlorine isotopes in lunar rocks suggest not, or at least not as much as other recent studies have proposed
Chemistry World March 18, 2013 Simon Hadlington	Dried lake bed on Mars 'could have supported life' New chemical analysis by the Mars rover Curiosity suggests that Mars was once more hospitable to life.
Geotimes November 2007 Nicole Branan	Volcanoes May Have Swallowed Early Earth's Oxygen New research suggests that early Earth did have oxygen during parts of the Archean (between 3.8 billion and 2.5 billion years ago), but volcanoes swallowed it up, thus preventing life from thriving.
Chemistry World January 28, 2015 Emma Stoye	Tiny volcanic cracks 'incubated' ancient DNA Tiny pores within volcanic rocks on ancient Earth may have provided the ideal conditions for replicating molecules, and could also have driven the evolution of longer and longer genetic sequences, researchers in Germany have shown.
Chemistry World February 13, 2014 Simon Poulton	The Earth as a cradle for life This enjoyable book by Stacey and Hodgkinson takes a long-term view of Earth's development as a habitable planet, incorporating physical, chemical and biological processes on the early Earth, to the modern world.
Science News March 17, 2001	TimeLine: March 14, 1931 70 Years Ago in Science News: New Welded Pipe Line Carries Water to San Diego... Age of Earth Determined as Over 2,000,000,000 Years... Moon Lacks Oxygen, Its Light Proves...
Chemistry World November 3, 2014 Tim Wogan	Earth ripe for life soon after formation There has been water on Earth since shortly after it formed, say researchers from the US, who compared the deuterium to hydrogen ratios in water on Earth and from the Vesta asteroid belt.
Chemistry World May 9, 2013 Simon Hadlington	Mineral dust plays key role in cloud formation, chemistry Mineral dust that swirls up into the atmosphere from Earth's surface plays a far more important role in both cloud formation and cloud chemistry than was previously realized.
Chemistry World March 11, 2014 Tim Wogan	Dinosaur mass extinction may have been triggered by acid rain Most scientists accept the principal cause of the Cretaceous -- Tertiary mass extinction was a 10km asteroid hitting the Yucatan peninsula, but the precise mechanism by which this caused the extinction remains controversial.
Chemistry World October 2, 2014 Tim Wogan	Photosynthesis-free route to oxygen gives early Earth atmosphere clues A direct mechanism for producing oxygen from carbon dioxide using far ultraviolet radiation has been experimentally demonstrated by researchers in the US, confirming a 14-year-old theoretical prediction.
Popular Mechanics December 16, 2008 Matthew Hutson	5 Projects Ask if Life on Earth Began as Alien Life in Space For years, scientists have considered the possibility of exogenesis, the idea that life arrived on Earth from another planet, and not just the building blocks of life, but organisms that were ready to rock and roll when they arrived.
Geotimes December 2005 Naomi Lubick	Slushball Life Hundreds of millions of years ago, a carapace of ice may have periodically covered the entire planet. New research, however, indicates that microbes seem to have thrived in certain places that they should not have during that time, leading scientists to conclude that the snowball was more slushy than frozen solid.
Popular Mechanics December 3, 2008 Glenn Harlan Reynolds	Why I Hope There's No Life on Mars If Mars is lifeless, that will make exploring -- and later settling -- the planet much easier.
Salon.com June 29, 2001 Suzy Hansen	We've got company Astronomer David Darling talks about the controversial science of astrobiology and the near-certainty that extraterrestrial life forms exist in our solar system...
Chemistry World February 26, 2008 Lewis Brindley	Your Hair Knows Where You've Been From a single strand of hair, scientists can now determine where a person has been living recently.
Geotimes January 2005 Sara Pratt	Acid Rain Curbs Global Warming In an odd twist that highlights the complex nature of interactions between Earth's systems, researchers have found that acid rain is significantly suppressing the global emission of methane from wetlands.
Chemistry World March 21, 2011 Michael Gross	Origin of life experiments revisited Modern analysis of forgotten samples has given chemists in the US additional insights the origins of life on Earth.
Popular Mechanics January 2009 Michael Milstein	World's Hardiest Organisms to Face 3 Years in Space When a Russian spacecraft sets off late this year to scrape samples of the Martian moon Phobos, at least 10 of Earth's toughest life-forms will be going along for the ride.
Geotimes November 2004 Naomi Lubick	Genesis Crashes with Pieces of the Sun The world watched last September as the spacecraft Genesis, launched in 1998, returned to Earth with a crash-landing on Utah's desert floor.
Chemistry World August 18, 2014 James Urquhart	History of King Richard III written in his teeth The chemistry of King Richard III's bones and teeth has shed light on how his social status, diet and where he lived changed during his life.
Geotimes November 2007 Carolyn Gramling	Acid Rain Alters Coastal Waters Excess carbon dioxide, sulfur and nitrogen from fossil fuel burning, agricultural runoff and other human sources are changing ocean chemistry -- and that impact is especially pronounced along the coasts, new research suggests.
National Gardening Charlie Nardozzi	Minerals for Soil How to use rock-based fertilizers and amendments to increase the vitality of your soil
Geotimes July 2007 Megan Sever	La Brea Yields Oil-Eating Bacteria Fossils are not the only surprises hidden in the Rancho La Brea tar pits in Los Angeles, Calif. Researchers have recently discovered entire new families of bacteria happily living in the toxic asphalt.
Chemistry World May 27, 2015 Rhian Jones	Isotope geochemistry Isotope geochemistry by William White is a comprehensive single volume that encompasses almost every imaginable aspect of both radiogenic and stable isotope geochemistry in remarkable detail.
Geotimes October 2004 Laura Stafford	Volcanic gas and early life Researchers have combined carbonyl sulfide with free amino acids in a reaction that created di-, tri- and tetra-peptides. The experiment was conducted under a variety of conditions meant to simulate Earth's early atmosphere.
Geotimes March 2007 Nicole Branan	Volcanic Signatures Reveal Climate Clues Besides providing a new tool to look at the climate impact of past volcanic eruptions, a new study also brings atmospheric scientists a step closer to unraveling the chemistry that sulfur aerosols undergo while they are in the stratosphere, which could help improve climate models.