|The First Art Newspaper on the Net
||Established in 1996
|| Thursday, January 21, 2021
|Climate change devastated dinosaurs not once, but twice|
Scientists have found evidence of this traumatic event some 179 million years ago in plant fossils in Argentine Patagonia. Photo: Pixabay/CC0 Public Domain.
by Marlowe Hood / Eléonore Hughes
PARIS (AFP).- Most people know that land-dwelling dinosaurs were wiped out some 66 million years ago when an asteroid roughly twice the diameter of Paris crashed into Earth.
If the explosive fireball didn't get them, the plunge in global temperature on a planet with little or no ice -- caused by a blanket of heat-shielding debris in the atmosphere -- did.
What most people don't know is that more than 100 million years earlier, another climate change cataclysm devastated a different set of dinosaur species, with many going extinct.
Except this time, it was global warming rather than global cooling that did them in, with the planet heating up more quickly than the dinos' capacity to adapt.
Scientists have found evidence of this traumatic event some 179 million years ago in plant fossils in Argentine Patagonia.
They also discovered a previously unknown dinosaur.
The species, called Bagualia alba, is in the family of massive, long-necked sauropods, the largest animals to walk the Earth.
Before the global warming event, sauropods were only one branch of the Sauropodomorpha lineage.
Other dinosaurs in the same group were smaller and lightly built, with some no bigger than a goat, according to a study published Wednesday in the Royal Society.
But a series of volcanic eruptions over several million years released huge amounts of CO2 and methane in the atmosphere, warming the planet and transforming the vegetation dinosaurs fed on.
The climate went from a temperate, warm and humid with a diverse lush vegetation to a strongly seasonal, hot-and-dry regime.
Smaller Sauropodomorpha dinosaurs were unable to cope with the change, but larger sauropods - like the Bagualia alba -- thrived.
"Sauropods are massive, four-legged animals with long necks," which meant they could reach the tops of trees, palaeontologist and lead author Diego Pol told AFP.
"Their very robust mandibles and spoon-shaped teeth were adapted to feed on all kinds of plants such as conifer trees."
Conifers in the early Jurassic had tough and leathery leaves that would be a challenge for any herbivore.
But that gave B. alba an advantage over other Sauropodomorpha dinosaurs, said Pol, head of the science department at the Egidio Feruglio palaeontology museum in Patagonia.
Sauropods' new diet saw them expanded in size from 10 metres to 40 metres in length, as large digestion chambers were needed to cope.
They became the dominant group of herbivores and eventually the largest animals to ever walk the Earth.
© Agence France-Presse
November 22, 2020
Remains of two killed in Vesuvius eruption are discovered at Pompeii
Climate change devastated dinosaurs not once, but twice
Kasmin Gallery opens an exhibition of new works by Ian Davenport
Met Opera seeks pay cuts in exchange for pandemic paychecks
Rare 'Tahiti' portrait by Gauguin set for French sale
Christie's Geneva Luxury Live & Online Auctions total $50.2 million
Magazzino Italian Art to expand campus with new pavilion
Emily Mason exhibition opens at the Bruce Museum
Exhibition at Ruiz-Healy Art features a diverse selection of works by Chuck Ramirez
Arecibo Observatory, a great eye on the cosmos, is going dark
PEM celebrates 250 years of female designers challenging fashion norms and fighting for opportunity
Chinese immigration in BC told as a story that is both local and global, historical and contemporary in exhibition
Timken Museum of Art to become the first museum worldwide to adopt revolutionary anti-viral technology
Signed letter from Confederate General to Robert E. Lee headed to Heritage Auctions
A world-record day for the Dark Knight as 'Detective Comics' No. 27 sells for $1.5 million
Royal Botanic Garden Edinburgh hosts UK premiere for Artists' Moving Image series
GNYP Gallery opens an exhibition of works by Brian Harte
Portraits of Tupac and Biggie receive the luxury treatment
Len Barry, 78, dies; Soulful voice of 'Bristol Stomp' and '1-2-3'
In 'Small Axe,' Letitia Wright plays a real-life Black Panther
Nelly Kaplan, whose films explored female strength, dies at 89
Jan Morris, celebrated writer of place and history, is dead at 94
Two Hong Kong political films win at Taiwan Golden Horse Awards
Christie's presents Rare Watches New York: Online, 24 November to 10 December 2020
How is art becoming one of the top career lines these years?
Tips to choose the best online flower delivery service
Where to buy Russian art online in 2020
How to choose an event venue?
How can you beat diabetes
Choosing the Right PJs for Your Children
List of Medicare Advantage Plans to Choose From
Museums, Exhibits, Artists, Milestones, Digital Art, Architecture, Photography,
Photographers, Special Photos, Special Reports, Featured Stories, Auctions, Art Fairs,
Anecdotes, Art Quiz, Education, Mythology, 3D Images, Last Week, .
|Royalville Communications, Inc|
Tell a Friend
Dear User, please complete the form below in order to recommend the Artdaily newsletter to someone you know.
Please complete all fields marked *.