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In rush to fight climate change, cities coordinate to battle heat with trees

From Seattle to Palm Beach, Florida, city leaders agree that urban areas need more trees to alleviate the effects of climate change. Amid the growing attention to tree canopy — and an infusion of federal funding — more than a dozen cities are convening to share ideas and plan the urban forests of the future. Leaders in many communities now consider trees to be critical infrastructure, providing shade, absorbing stormwater runoff and filtering air pollution. The focus on urban forests has coincided with a growing recognition that low-income neighborhoods and communities of color often have far ...

AI better than humans at key heart test: study

Artificial intelligence is better than humans at assessing heart ultrasounds, the main test of overall cardiac health, the most rigorous trial yet conducted on the subject found on Wednesday.

While previous research has illustrated the potential power of AI models for reading medical scans, the authors of the new US study said it is the first blinded, randomised clinical trial for heart health.

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Racist and sexist depictions of human evolution still permeate science, education and popular culture today

Systemic racism and sexism have permeated civilization since the rise of agriculture, when people started living in one place for a long time. Early Western scientists, such as Aristotle in ancient Greece, were indoctrinated with the ethnocentric and misogynistic narratives that permeated their society. More than 2,000 years after Aristotle’s writings, English naturalist Charles Darwin also extrapolated the sexist and racist narratives he heard and read in his youth to the natural world.

Darwin presented his biased views as scientific facts, such as in his 1871 book “The Descent of Man,” where he described his belief that men are evolutionarily superior to women, Europeans superior to non-Europeans and hierarchical civilizations superior to small egalitarian societies. In that book, which continues to be studied in schools and natural history museums, he considered “the hideous ornaments and the equally hideous music admired by most savages” to be “not so highly developed as in certain animals, for instance, in birds,” and compared the appearance of Africans to the New World monkey Pithecia satanas.

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Is red tide on Florida’s coast here to stay? What to know about easing the toxic bloom.

SARASOTA, Fla. — With red tide again frustrating beachgoers since October, many residents may be wondering what can be done about it. Scientists have been working to find technologies that will help lessen the hazardous effects of red tide thanks to the Florida Red Tide Mitigation & Technology Development Initiative, a partnership between Mote Marine Laboratory and the Florida Fish and Wildlife Conservation Commission. After red tide fouled beaches along seven Florida counties in 2018 — aggravating health problems and costing local communities millions of dollars — then-Gov. Rick Scott declare...

Archaeology and genomics together with Indigenous knowledge revise the human-horse story in the American West

Horses first evolved in the Americas around 4 million years ago. Then horses largely disappeared from the fossil record by about 10,000 years ago. However, archaeological finds from the Yukon to the Gulf Coast make it clear that horses were an important part of ancient lifeways for the early peoples of North America.

Millennia later, horses were reintroduced by European colonists, and eventually the Great Plains became home to powerful Indigenous horse cultures, many of which leveraged their expertise on horseback to maintain sovereignty even amid the rising tides of colonial exploitation, genocide and disease.

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Webb telescope discovers oldest galaxies ever observed

Paris (AFP) – The James Webb Space Telescope has discovered the four most distant galaxies ever observed, one of which formed just 320 million years after the Big Bang when the universe was still in its infancy, new research said on Tuesday.

The Webb telescope has unleashed a torrent of scientific discovery since becoming operational last year, peering farther than ever before into the universe's distant reaches -- which also means it is looking back in time.

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Seaweed mass expands, reaches record tonnage in Florida

MIAMI — We already knew South Florida beaches were bracing for a surge of seaweed, but the mass of seaweed looming in the Atlantic Ocean is now officially record-breaking. The Great Atlantic Sargassum Belt — the official name for the collection of floating brown seaweed that sprawls across 5,000 miles from the Gulf of Mexico to the west coast of Africa — contained about 13 million tons of seaweed by the end of March, according to researchers at the University of South Florida’s Optical Oceanography Lab who have been monitoring the sargassum belt via satellite. That’s a new record for this time...

NASA announces 4 astronauts flying to the moon on Artemis II

ORLANDO, Fla. — Humans haven’t traveled beyond low-Earth orbit in more than 50 years, but that’s set to change with the launch of the Artemis II mission to orbit the moon next year with four passengers on board. Just who will be flying was revealed today. NASA and the Canadian Space Agency named the four astronauts that will climb aboard the Orion spacecraft to be launched atop the Space Launch System rocket from Kennedy Space Center as early as November 2024. Commanding the mission will be Reid Wiseman, the former head of NASA’s astronaut office who stepped down to be eligible to fly on missi...

Scientists in Arctic race to preserve 'ice memory'

Scientists camped in the Arctic are set to start drilling to save samples of ancient ice for analysis before the frozen layers melt away due to climate change, mission organizers said on Monday.

Italian, French and Norwegian researchers are in Norway's Svalbard archipelago in what they called a race against time to preserve crucial ice records for analyzing past environmental conditions -- planning to ship them all the way to the Antarctic for storage.

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Has GPT-4 really passed the startling threshold of human-level artificial intelligence? Well, it depends

Recent public interest in tools like ChatGPT has raised an old question in the artificial intelligence community: is artificial general intelligence (in this case, AI that performs at human level) achievable?

An online preprint this week has added to the hype, suggesting the latest advanced large language model, GPT-4, is at the early stages of artificial general intelligence (AGI) as it’s exhibiting “sparks of intelligence”.

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Sabertooth cat skull newly discovered in Iowa reveals details about this Ice Age predator

The sabertooth cat is an Ice Age icon and emblem of strength, tenacity and intelligence. These animals shared the North American landscape with other large carnivores, including short-faced bears, dire wolves and the American lion, as well as megaherbivores including mammoths, mastodons, muskoxen and long-horned bison. Then at the end of the Pleistocene, between 50,000 and 10,000 years ago, they all vanished. The only place to see them now is in the fossil record.

Carnivore fossils are extremely rare, though, in comparison to those of their prey. Prey are always more abundant than predators in a healthy ecosystem. So the probability of burial, storage and discovery of carnivore bones and teeth is therefore slim compared to those belonging to herbivores.

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Humans vs. machines: the fight to copyright AI art

By Tom Hals and Blake Brittain

(Reuters) - Last year, Kris Kashtanova typed instructions for a graphic novel into a new artificial-intelligence program and touched off a high-stakes debate over who created the artwork: a human or an algorithm.

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