ancient soils reveal clues to early life on earth
Last Updated : GMT 06:49:16
Arab Today, arab today
Arab Today, arab today
Last Updated : GMT 06:49:16
Arab Today, arab today

Ancient soils reveal clues to early life on Earth

Arab Today, arab today

Arab Today, arab today Ancient soils reveal clues to early life on Earth

Tehran - FNA

Oxygen appeared in the atmosphere up to 700 million years earlier than we previously thought, according to research published today in the journal Nature, raising new questions about the evolution of early life. Researchers from the University of Copenhagen and University of British Columbia examined the chemical composition of three-billion-year-old soils from South Africa -- the oldest soils on Earth -- and found evidence for low concentrations of atmospheric oxygen. Previous research indicated that oxygen began accumulating in the atmosphere only about 2.3 billion years ago during a dynamic period in Earth's history referred to as the Great Oxygenation Event. "We've always known that oxygen production by photosynthesis led to the eventual oxygenation of the atmosphere and the evolution of aerobic life," says Sean Crowe, co-lead author of the study and an assistant professor in the Departments of Microbiology and Immunology, and Earth, Ocean and Atmospheric Sciences at UBC. "This study now suggests that the process began very early in Earth's history, supporting a much greater antiquity for oxygen producing photosynthesis and aerobic life," says Crowe, who conducted the research while a post-doctoral fellow at Nordic Center for Earth Evolution at the University of Southern Denmark in partnership with the centre's director Donald Canfield. There was no oxygen in the atmosphere for at least hundreds of millions of years after Earth formed. Today, Earth's atmosphere is 20 per cent oxygen thanks to photosynthetic bacteria that, like trees and other plants, consume carbon dioxide and release oxygen. The bacteria laid the foundation for oxygen breathing organisms to evolve and inhabit the planet. "These findings imply that it took a very long time for geological and biological processes to conspire and produce the oxygen rich atmosphere we now enjoy," says Lasse Døssing, the other lead scientist on the study, from the University of Copenhagen.

arabstoday
arabstoday

Name *

E-mail *

Comment Title*

Comment *

: Characters Left

Mandatory *

Terms of use

Publishing Terms: Not to offend the author, or to persons or sanctities or attacking religions or divine self. And stay away from sectarian and racial incitement and insults.

I agree with the Terms of Use

Security Code*

ancient soils reveal clues to early life on earth ancient soils reveal clues to early life on earth

 



Name *

E-mail *

Comment Title*

Comment *

: Characters Left

Mandatory *

Terms of use

Publishing Terms: Not to offend the author, or to persons or sanctities or attacking religions or divine self. And stay away from sectarian and racial incitement and insults.

I agree with the Terms of Use

Security Code*

ancient soils reveal clues to early life on earth ancient soils reveal clues to early life on earth

 



GMT 10:06 2012 Saturday ,28 July

Querrey advances at ATP LA Open

GMT 21:15 2017 Thursday ,01 June

Trump condemns deadly Kabul explosion

GMT 02:15 2017 Thursday ,24 August

Is your country on the Qatar free entry list of 80?

GMT 19:48 2016 Monday ,03 October

Controversial boxing champ Tyson Fury retires

GMT 08:20 2015 Tuesday ,08 December

PC market woes show no sign of easing

GMT 17:27 2017 Tuesday ,25 April

20 Yemeni soldiers killed, injured in explosion

GMT 11:52 2017 Saturday ,30 December

OIC condemns Mar Mina Church attack

GMT 00:03 2017 Saturday ,25 March

Arab Meeting to Examine Anti-Corruption Methods

GMT 13:12 2017 Thursday ,20 April

Deputy premier meets Arab League chief

GMT 14:13 2014 Friday ,10 January

Opel Astra GTC

GMT 18:27 2016 Tuesday ,02 August

Turkish Foreign Minister arrives in Islamabad

GMT 11:27 2016 Tuesday ,13 December

Saudi woman arrested for challenging social norms
Arab Today, arab today
 
 Arab Today Facebook,arab today facebook  Arab Today Twitter,arab today twitter Arab Today Rss,arab today rss  Arab Today Youtube,arab today youtube  Arab Today Youtube,arab today youtube

Maintained and developed by Arabs Today Group SAL.
All rights reserved to Arab Today Media Group 2021 ©

Maintained and developed by Arabs Today Group SAL.
All rights reserved to Arab Today Media Group 2021 ©

arabstoday arabstoday arabstoday arabstoday
arabstoday arabstoday arabstoday
arabstoday
بناية النخيل - رأس النبع _ خلف السفارة الفرنسية _بيروت - لبنان
arabstoday, Arabstoday, Arabstoday