Earth's oldest biological colour discovered in rocks beneath Sahara Desert

11 Juillet, 2018, 18:55 | Auteur: Therese Cote
  • The colour. Image ANU

Scientists believe they have discovered the oldest colours in the world and they are bright pink.

An global team of scientists discovered the oldest color in the geological record in rocks beneath the Sahara desert: the bright pink pigment aged 1.1 billion years old.

"The precise analysis of the ancient pigments confirmed that tiny cyanobacteria dominated the base of the food chain in the oceans a billion years ago", Gueneli said in a statement.

It was first announced in the journal PNAS that the discovered fossils reportedly range from a dark blood red to a deep purple, when diluted these become bright pink. The bacteria are thought to be an incredible 1.1 billion years old.

ANU PhD student, Dr Nur Gueneli, discovered the pigments after running an organic solvent through the powdered rock.

The BBC reports that the pigment comes from the chlorophyll of fossilized cyanobacteria, also known as blue-green algae, whose pigment molecules have survived eons in the ground.

The pigments found were produced by photosynthetic organisms that inhabited an ancient ocean.

Courtois to decide on his Chelsea future after the World Cup
The difference is that my kids are in Madrid, and they have seen the game and they see their father and they want him to be close. Reports in Italy state Chelsea owner Roman Abramovich is focused on signing Roma goalkeeper Alisson.

Trump, NATO head Stoltenberg have testy exchange at summit
Trump has praised Brexiteers and trashed the European Union in the past, and he piled on ahead of his first visit to Britain. The president has lashed out at countries that fall short. "Will they reimburse the U.S. ?" he said in one tweet .

Pakistan beat Australia to clinch tri-nation T20I series in Zimbabwe
He had a fantastic tri-series tournament where he scored 61, 6, 47, 73 and 91 runs to help his team beat Australia in the final. Australia will bat first in their Twenty20 tri-series final against Pakistan after captain Aaron Finch won the toss .

And that pigment was a fetching shade of pink.

Brocks explained this is an ancient process, but piecing together major events in Earth's geological history helped them date their color discovery.

In 1993, shale deposited some time during the Cambrian around half a billion years ago was considered the oldest example of molecular building blocks of chlorophyll called porphyrins.

Considering oxygen levels started to rise around 3.4 billion years ago, that earlier find still left us with a big gap in fossil evidence of sunlight-harvesting pigments. That algae provided the "burst of energy needed for the evolution of complex ecosystems, where large animals, including humans, could thrive on Earth", he said.

Senior lead researcher Associate Professor Jochen Brocks from The Australian National University said that the emergence of large, active organisms was likely to have been restrained by a limited supply of larger food particles, such as algae.

The team of researchers from Australia, Japan and the United States of America also were able to use the pigments to confirm that ancient marine ecosystems were dominated by tiny cyanobacteria, a type of bacteria that obtains energy through photosynthesis. While algae is microscopic, it is many thousands of times larger than cyanobacteria making for a much richer food source.

Conseillé:



Populaire

How to Watch England vs. Croatia
Croatia were forced to work hard for their place in the semis, needing a penalty shoot-out to beat hosts Russian Federation . We feel proud and happy we are in the semifinals, but we do not want to stop there.

Toronto Public Health recommending decriminalization of all drugs for personal use
The drug policy consultation was completed in response to the growing opioid crisis happening across the country. The overdose crisis, Dr.de Villa said, is a public-health issue, and deaths stemming from it can be prevented.

Broncos' Madden NFL '19 ratings released
Von Miller is the team's highest-ranked player, as he was one of just seven players in the league to earn a 99-overall rating. Next comes the Atlanta Falcons, Pittsburgh Steelers and New Orleans Saints, each of whom have a rating of 83.

International : Belgique-France : Hazard plaisante au sujet de Mbappé
Il faut lui laisser peu d'espaces. ", avait récemment admis Raphaël Varane au sujet du létal ailier belge". Dans le football moderne, on n'avait jamais connu ça. "C'est un joueur avec un immense talent".

Jose Mourinho delivers Paul Pogba verdict as France reach World Cup final
Both teams have fought their way valiantly to this point, even getting through penalty shootouts to advance. It is in the knockout rounds that I hit my stride, though, and I hope to continue like this.

Téléchargement automatique de séries sur Android — Netflix
Ce " smart download " est une fonction qui commence à être déployée aujourd'hui sur Android et qui arrivera sur iOS dans le courant de l'année.

S Korea Suspends Iran Oil Loading under US Pressure
In late June, it demanded its allies halt all imports of Iranian oil from November and said exemptions were unlikely. On Wednesday, Trump said OPEC is "driving oil prices higher", urging the cartel to reduce the price at the soonest.

Donald Trump nomme un nouveau conservateur à la Cour suprême — Etats-Unis
Le président des Etats-Unis a nommé lundi Brett Kavanaugh comme nouveau juge de la Cour suprême du pays. Trois magistrats semblaient tenir la corde dimanche: Brett Kavanaugh, un ancien conseiller de George W.

Cakir au sifflet — Croatie-Angleterre
Un match que vous pourrez également suivre via internet sur le site de TF1, MyTF1 et sur le player beIN Sports Connect . Lors du Mondial russe, il a déjà dirigé Maroc-Iran et Nigeria-Argentine (9 cartons jaunes distribués au total).

Liverpool open talks with Stoke City over Xherdan Shaqiri
Klopp, meanwhile, remains keen to add at least one more attacking midfielder to his squad this summer. He admitted that he would like to leave following last season's relegation.