HOME >> BIOLOGY >> NEWS
Earlier water on Earth? Oldest rock suggests hospitable young planet

Geological evidence suggests that Earth may have had surface water -- and thus conditions to support life -- millions of years earlier than previously thought. Scientists reconstructed the portrait of early Earth by reading the telltale chemical composition of the oldest known terrestrial rock. The 4.4-billion year-old mineral sample suggests that early Earth was not a roiling ocean of magma, but instead was cool enough for water, continents, and conditions that could have supported life. The age of the sample may also undermine accepted current views on how and when the moon was formed. The research was supported in part by the National Science Foundation (NSF), and is published in this week's issue of the journal Nature.

"This appears to be evidence of the earliest existence of liquid water on our planet," says Margaret Leinen, assistant director of NSF for geosciences. "If water occurred this early in the evolution of earth, it is possible that primitive life, too, occurred at this time."

By probing a tiny grain of zircon, a mineral commonly used to determine the geological age of rocks, scientists from the University of Wisconsin-Madison, Colgate University, Curtin University in Australia and the University of Edinburgh in Scotland have found evidence that 4.4 billion years ago, temperatures had cooled to the 100-degree Centigrade range, a discovery that suggests an early Earth far different from the one previously imagined.

"This is an astounding thing to find for 4.4 billion years ago," says John Valley, a geologist at UW-Madison. "At that time, the Earth's surface should have been a magma ocean. Conventional wisdom would not have predicted a low-temperature environment. These results may indicate that the Earth cooled faster than anyone thought." Previously, the oldest evidence for liquid water on Earth, a precondition and catalyst for life, was from a rock estimated to be 3.8 billion years o
'"/>

Contact: Cheryl Dybas
cdybas@nsf.gov
703-292-8070
National Science Foundation
8-Jan-2001


Page: 1 2 3

Related biology news :

1. Earlier weaning, high-energy diet produce higher quality beef
2. Precursors To Red Blood Cells Form Earlier Than Previously Thought
3. Earlier Human Speech?
4. Brain-Activity Data Clarify Contradictions In Earlier Anxiety Research
5. New Arizona State center brings science to policy on issues of water resources and urban growth
6. Posters highlight water, energy and other natural resource research
7. Wastewater could treat itself, power city
8. Byproduct of water-disinfection process found to be highly toxic
9. Sandia experiments may reduce possibility of future water wars
10. NASA satellites detect glow of plankton in black waters
11. Cleaner water, more efficient electricity among UH chemical research

Post Your Comments:
*Name:
*Comment:
*Email:


(Date:5/14/2020)... ... May 14, 2020 , ... The annual salary report by ... 2019 average medical sales rep total compensation increased by $12,000 over the previous ... COVID-19 global crisis. , The MedReps 2020 Salary Survey revealed yet again there’s ...
(Date:5/1/2020)... ... April 30, 2020 , ... Flagship Biosciences , ... Inc., a biopharmaceutical and regulatory services advisor. The companies now deliver regulatory strategy ... Corritori are taking a collaborative approach to empower more confident and informed regulatory ...
(Date:4/30/2020)... ... April 29, 2020 , ... At ... growth – delivering innovative solutions for a wide range of industries including pharmaceutical ... agencies. A month into the new decade, it was clear to company leadership ...
Breaking Biology News(10 mins):
(Date:5/14/2020)... ... May 13, 2020 , ... In collaboration with Sartorius, ... in the Life Science Lab . The comprehensive information source was created for ... and liquid handling to contamination control. , The content hub features the latest ...
(Date:5/5/2020)... Fla. (PRWEB) , ... May 05, 2020 , ... ... and solutions company, announced today the launch of its iGlucose® LTE ... new iGlucose solution utilizes LTE Cat-M1 technology, the industry’s newest and broadest cellular ...
(Date:4/22/2020)... CHESTER, Ohio (PRWEB) , ... April 21, 2020 ... ... of Biophen™ FXIII chromogenic method for determination of FXIII. , Aniara Diagnostica, a ... strengthened its commitment to meeting today’s highest standards for product quality and cost-efficient ...
(Date:4/1/2020)... ... March 30, 2020 , ... Kinetic Vet, ... RTU, an EPA-approved spray-on antimicrobial solution. As a first-of-its-kind technology within the animal ... antimicrobial activity against microorganisms for up to 90 days. , In addition to ...
Breaking Biology Technology:
Cached News: