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☆ The evolutionary twist that could have helped dinosaurs rule Earth
▼ + stars: | 2024-05-18 | by ( Katie Hunt | ) edition.cnn.com time to read: +6 min

New research this week is adding fresh detail to one of paleontology’s biggest questions: Did dinosaur blood run hot or cold? Clues from fossilized eggshells and bones have now suggested that some dinosaurs were warm-blooded and others were not. Reinhard Dirscherl/ullstein bild/Getty ImagesMarine scientists have used artificial intelligence to decode previously unknown complexity in the calls of sperm whales. The whales produced a catalog of clicking sounds, which the researchers described as akin to a “phonetic alphabet” for sperm whales. What sperm whales are saying with their clicks remains a mystery to human ears, but understanding the scope of their vocal exchanges is an important step toward linking their calls with specific behavior.

Persons: Dinos, Davide Bonadonna, Jeff Lichtman, Reinhard Dirscherl, Napoleon Bonaparte, Ashley Strickland, Katie Hunt Organizations: CNN, Vigo, UCL, Google Research, Lichtman, Harvard University, Google, Harvard, Northern, Central America, Getty Images Marine, —, Heritage, CNN Space, Science Locations: Universidade, North America, Scandinavia, Europe, Central, India, Dover, England

☆ 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

☆ Foxes were once humans’ best friends, study says
▼ + stars: | 2024-04-11 | by ( Mindy Weisberger | ) edition.cnn.com time to read: +7 min

Archaeologists originally uncovered the near-complete D. avus skeleton buried alongside a human at Cañada Seca, a site in northern Patagonia, in 1991. Parts of the D. avus specimen were buried alongside a human at Cañada Seca, a site in northern Patagonia. D. avus lived from the Pleistocene Epoch (around 2.6 million to 11,700 years ago) into the Holocene, becoming extinct about 500 years ago. With a similar diet to D. avus, dogs may have helped speed the foxes’ extinction by outcompeting them. Dogs could also have carried and transmitted diseases that sickened the foxes, Lebrasseur added.

Persons: wasn’t, Ophélie, avus, Francisco Prevosti “, Dusicyon avus, ”, Lebrasseur, Cinthia, ” Lebrasseur, Dr, Aurora, d’Anglade, ‘, Francisco Prevosti, it’s, ” Mindy Weisberger Organizations: CNN, Wellcome Trust, Archaeology Research, University of Oxford’s School of Archaeology, Royal Society Open Science, Argentina’s, Technical Research, Universidade, Oxford, Scientific Locations: what’s, Argentina, South America, Cañada Seca, Patagonia, United Kingdom, Europe, Asia, Spain, Patagonia . Hunter

☆ The first known hybrid between a dog and a fox was discovered in Brazil after being hit by a car
▼ + stars: | 2023-09-16 | by ( Alia Shoaib | ) www.businessinsider.com time to read: +4 min

The first known hybrid between a pampas fox and a domestic dog was discovered in Brazil. Her father was a domestic dog of an unspecified breed. AdvertisementAdvertisementThe dog-fox resembles both a dog and a fox and shares characteristics with both animals, scientists said. Other names suggested for the animal were "graxorra" and "dogxim," which reference the Portuguese names for the pampas fox and female dog. This type of hybridization can threaten wildlife conservation due to risks of introgression and disease transmission by the dog, the study said.

Persons: Flávia Ferrari, Ferrari, Bruna Elenara Organizations: Service, British, The Telegraph, Telegraph, Universidade Federal Locations: Brazil, Wall, Silicon, South America, Universidade, Rio Grande do Sul, North America, Europe, Africa, Universidade Federal, Santa Maria

☆ Damselfish in Distress: Warmer Seas Might Be Clouding Their Brains
▼ + stars: | 2023-08-23 | by ( Rebecca Dzombak | ) www.nytimes.com time to read: +1 min

Warmer seas could be making fish forgetful. Now, a new study suggests for the first time that high water temperatures can cause memory loss in reef fish, and even render them unable to learn at all. Tropical fish live in complex environments and they’re constantly faced with decisions: What to eat, whom to fight, where to go. A lot has been done to understand how heat can kill fish, Dr. Luchiari said. But there’s relatively little research on how heat affects learning and memory in tropical fish that manage to survive high temperatures.

Persons: they’re, ”, Ana Carolina Luchiari, Luchiari Locations: Universidade Federal, Rio Grande do Norte, Natal, Brazil

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