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☆ Mega El Niño events may have caused planet’s greatest mass extinction
▼ + stars: | 2024-09-12 | by ( Katie Hunt | ) edition.cnn.com time to read: +8 min

The El Niño of 252 million years ago would have originated in the Panthalassic Ocean, a body of water much larger than today’s Pacific that could hold more heat, which in turn would have strengthened and sustained El Niño effects. The planet had experienced similar episodes earlier but they hadn’t triggered a mass extinction. A prolonged and intense El Niño also explained why extinctions had begun on land before they occurred in the ocean, the study said. This data showed how temperature rose at different latitudes as the mass extinction unfolded. El Niño events today are known to cause coral bleaching and mass mortality of fish, the study noted, but the ecological impact and future trajectory of El Niño events in a warming climate are unknown.

Persons: ”, Paul Wignall, David Bond, Paul Wignall El, Alex Farnsworth, El, ” Wignall, Niño, “, Yadong Sun, Niños, Wignall, Farnsworth, Alfio Alessandro Chiarenza, Chiarenza, wasn’t Organizations: CNN, University of Leeds, El, University of Hull, UK’s University of Bristol, China University of Geosciences, University of Bristol, Royal Society Newton International, University College London’s, supervolcanoes Locations: what’s, Russia, United Kingdom, Ellesmere, El, Pacific, Wuhan

☆ Did dinosaur blood run hot or cold? Both, according to a new study
▼ + stars: | 2024-05-15 | by ( Katie Hunt | ) edition.cnn.com time to read: +6 min

CNN —Were dinosaurs warm-blooded like birds and mammals or cold-blooded like reptiles? Clues from dinosaur eggshells and bones have suggested that some dinosaurs were warm-blooded and others were not. These dinosaurs may have evolved endothermy, or the ability to internally generate body heat, according to the study. “Warm-blooded animals are generally more active, for example, cold-blooded animals usually don’t build nests,” said lead study author Dr. Alfio Alessandro Chiarenza, Royal Society Newton International Fellow at University College London’s department of Earth sciences. Her 2022 study suggested that ornithischians were more likely cold-blooded and sauropods were warm-blooded.

Persons: Big John, Sarah Meyssonnier, ornithischians, ”, Alfio Alessandro Chiarenza, Brontosaurus, ” Chiarenza, “, Jasmina, ” Wiemann, Chiarenza, Anthony Fiorillo, ” Fiorillo, wasn’t Organizations: CNN, Royal Society Newton International, University College London’s, Field, UCL, Universidade de, New, New Mexico Museum, Southern Methodist University Locations: Paris, Chicago, Spain, New Mexico, Dallas

☆ Asteroid that doomed the dinosaurs halted key process for life on Earth, scientists say
▼ + stars: | 2023-10-30 | by ( Katie Hunt | ) edition.cnn.com time to read: +5 min

This dust blocked the sun to an extent that plants were unable to photosynthesize, a biological process critical for life, for almost two years afterward. Pim KaskesAn unexpected killing mechanismTo reach their findings, scientists developed a new computer model to simulate the global climate after the asteroid strike. Fossilized fish found at the site have revealed that the asteroid struck off Mexico’s Yucatán Peninsula in springtime. The team determined that this fine dust could have remained in the atmosphere for up to 15 years after the asteroid strike. The researchers suggested the global climate may have cooled by as much as 15 degrees Celsius.

Persons: ”, Cem Berk Senel, Pim Kaskes, ” Senel, Alfio Alessandro Chiarenza, Chiarenza Organizations: CNN, Royal Observatory of, …, University of Vigo Locations: Mexico, Royal Observatory of Belgium, “, North Dakota, Spain

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