Dung beetles are among the strongest animals in the world. They also possess an exceptional ability to cooperate. Research shows that female and male spider dung beetles together are able to move large dung balls across difficult obstacles. However, same-sex attempts to do the same always ended in aggressive fights.
Dung beetles live in and on animal droppings. By breaking down organic substances, the tiny insects play an invisible yet important role in nature. Researchers have now discovered another task at which dung beetles excel.
Female and male spider dung beetles managed, in a kind of synchronized dance, to move balls of droppings, equivalent to 10 times their body weight over vertical obstacles of height up to 20 centimeters. The experiments were carried out in South Africa and Italy under the leadership of biology researcher Claudia Tocco from Lund University.
“We were very surprised to see that they could cooperate and help each other move an object without knowing its final destination. This is an ability that only humans possess. We believe that the dung beetles use tactile communication, but this has not yet been proven,” says Tocco.
Credit: Lund University
Another discovery was that the spider dung beetles roll their dung balls in a straight path even if they encounter obstacles along the way. When a rock or a log appears, they simply climb over the obstacle. The researchers were also able to establish that the advanced cooperation and climbing only applied to pairs of dung beetles of different sexes.
“When spider dung beetles of the same sex would try to cooperate, it always ended in serious fights that resulted in the dung ball breaking, or one of the dung beetles running away with it,” says Tocco.
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Beetles cooperate on tricky dung moves (2024, September 19)
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Meta, which owns Facebook, WhatsApp and Instagram, recently halted plans to harvest data from European users to train its AI models after pressure from privacy regulators.
A group of companies including Meta and Spotify blasted the European Union Thursday for its “fragmented and inconsistent” decision-making on data privacy and artificial intelligence (AI).
The firms along with several researchers and industry bodies signed an open letter claiming that Europe was already becoming less competitive and risked falling further behind in the age of AI.
The signatories called for “harmonized, consistent, quick and clear decisions” from data privacy regulators to “enable European data to be used in AI training for the benefit of Europeans”.
Meta, which owns Facebook, WhatsApp and Instagram, recently halted plans to harvest data from European users to train its AI models after pressure from privacy regulators.
“In recent times, regulatory decision making has become fragmented and unpredictable, while interventions by the European Data Protection Authorities have created huge uncertainty about what kinds of data can be used to train AI models,” said the letter.
A European Commission spokesperson said at the time that all companies in the EU were expected to abide by data privacy rules.
Meta has faced record fines for breaching the privacy of users, including a single penalty of more than one billion euros under GDPR.
As well as data privacy rules, Europe became the first regional bloc to frame major legislation aiming to stop abuses of the technology—its AI Act coming into force earlier this year.
Meta and other tech giants have increasingly delayed products for the European market, claiming they were seeking legal clarity.
Meta delayed the EU-wide release of its Twitter alternative Threads by several months last year.
Google has similarly held back the release of AI tools in the EU.
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Meta and Spotify blast EU decisions on AI (2024, September 19)
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Simulated sea surface temperature changes and upper ocean currents after 72 hours since tropical cyclone initiation according to ocean mixed layer depth: 2 m (a), 5 m (b), 10 m (c), 15 m (d), 20 m (e), 50 m (f) and 100 m (g). Credit: Zhang et al. 2024.
Tropical cyclones can have severe consequences for both the marine and terrestrial environments, as well as the organisms and communities who inhabit them. In the oceans, there can be alterations in sea surface temperature that disrupt biological processes and hospitable conditions for life, the devastation of surface algae and other primary producers, which impacts complex marine food chains, as well as damaging coral reefs. Meanwhile, on land, the heavy rainfall, strong winds and storm surges can lead to significant damage to property and infrastructure, as well as loss of lives.
These natural phenomena are powered by warm surface waters, as the rising water vapor causes condensation of water droplets, and thus cloud formation and rain. This releases heat, warming the atmosphere further and causing the air to continue to rise, bringing in cooler air towards the base, which we experience as strong winds. Consequently, as tropical cyclones move over land they lose this initial energy source and eventually dissipate.
Therefore, the surface layer of the ocean is particularly important. Recent research published in Frontiers in Marine Science has investigated how the depth of the mixed layer (the deepest layer affected by surface turbulence and separating cooler ocean depths from atmospheric interactions) impacts ocean temperatures, and subsequently tropical cyclone formation.
To do so, Yalan Zhang, of China’s National University of Defense Technology, and colleagues used models to simulate different ocean mixed layer depth (2 m, 5 m, 10 m, 15 m, 20 m, 50 m and 100 m) influences on tropical cyclones in the western North Pacific over four days, in both one and three dimensions. The former model type focuses mostly on the influence of depth, while the latter incorporates heat, salinity and water mass movement (for example, upwelling).
Tropical cyclone destructive potential (PDS) increase according to seven experimental ocean mixed layer depths. Credit: Zhang et al. 2024.
The researchers found that ocean mixed layer depth only has a small influence on the track the tropical cyclone takes, with slower translation speeds resulting from shallower ocean mixed layer depth moving the center of the tropical storm. However, they discovered a greater impact on the size and intensity of the event, reaching its peak 72 to 84 hours after initiation.
Importantly, this is only the case up to 15 m water depth, after which the ocean mixed layer depth prior to the tropical cyclone has marginal influence on the destructiveness of the event. The destructive potential increased 325.2% when the ocean mixed layer depth reached 5 m, reducing to 50% at 15 m and below 15% at depths thereafter.
This is because surface winds bring cold water from below the ocean mixed layer depth when it is shallower than 15 m, which decreases the temperature of the upper ocean. In fact, the scientists suggest 75% to 90% of sea surface cooling can be attributed to turbulence from wind-induced vertical shear (the change in wind speed and direction with altitude).
However, as the ocean mixed layer depth increases beyond this threshold point of 15 m, the effect of surface winds on sea surface temperature cooling is reduced, leading to increasing surface temperatures below the tropical cyclones, therefore fueling their development.
Furthermore, the passage of multiple tropical cyclones through the same area can cause the ocean mixed layer depth to deepen, which may reduce their future activity in that region, though the timescales between events to allow this are still being studied.
This research is significant, as global warming is likely to exacerbate tropical cyclone occurrences due to rising sea surface temperatures, so the role of ocean mixed layer depth in modulating these is paramount to understanding these phenomena of the marine realm and allowing populations to mitigate against their devastation in vulnerable regions.
More information:
Yalan Zhang et al, Impact of ocean mixed layer depth on tropical cyclone characteristics: a numerical investigation, Frontiers in Marine Science (2024). DOI: 10.3389/fmars.2024.1395492
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Tropical cyclone intensity exacerbated by increasing depth of ocean mixed layer, finds study (2024, September 19)
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Lionsgate will work with artificial intelligence research company Runway to create and train a new artificial intelligence model customized to the “Hunger Games” and “John Wick” studio’s film and TV content, marking the AI company’s first collaboration with a Hollywood studio.
The model will generate cinematic video that can then be edited with Runway’s suite of tools, the Santa Monica-based studio said Wednesday.
Lionsgate Vice Chair Michael Burns said in a statement that several of the studio’s filmmakers were “already excited” about the potential applications for AI in pre- and postproduction processes.
“We view AI as a great tool for augmenting, enhancing and supplementing our current operations,” he said.
AI has emerged as a thorny issue in Hollywood, as entertainment companies want to harness such powerful tools to reduce costs and streamline their operations, but also don’t want to offend actors, writers and behind-the-scenes workers who fear that the technology will replace them.
Runway is far from the first AI company making inroads into the entertainment business. Already, ChatGPT maker OpenAI has started to meet with entertainment industry players to demonstrate its latest technology.
Also on Wednesday, YouTube said it would make an AI-powered text-to-video tool, Veo, available for creators later this year on YouTube Shorts. Through Veo, creators can type descriptions like “dreamlike secret garden, vivid colors, visible brushstrokes,” and a six-second clip will be created with AI depicting that image. Videos generated with AI will be labeled as such, YouTube said.
YouTube also announced it will add a “brainstorming buddy powered by AI” in its YouTube Studio that will suggest video ideas to creators that could help their projects.
“When we show this to creators, the thing they love most is how it unlocks elements of an idea they hadn’t even thought of yet,” said Sarah Ali, senior director of product, leading YouTube’s creation experiences and YouTube Shorts during a presentation in New York.
“This is not about replacing your ideas. It is about providing you with the tools to help you get there faster, or to uncover new areas you just hadn’t considered before.”
2024 Los Angeles Times. Distributed by Tribune Content Agency, LLC.
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‘Hunger Games’ studio Lionsgate to partner with AI company (2024, September 19)
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California is home to eight species of rattlesnakes. The reptiles can be seen on hiking trails, rural roads and even in your backyard, according to the Los Angeles County Department of Public Health.
The California Poison Control System said it receives hundreds of reports of rattlesnake bites every year, especially during peak rattlesnake season.
The venomous creatures tend to mate in the early summer. With young rattlers set to make their debut, you’re sure to see more of the scaly reptiles, experts say.
Here’s what to know and how to stay safe in California this rattlesnake season:
When are baby rattlesnakes born?
Rattlesnakes are most active outdoors from April through October, typically mating in the warmer months before giving birth in the fall, according to the California Department of Fish and Wildlife.
Female rattlesnakes will seek out old rodent burrows and tight crevices for nesting, and can give birth to as many as 25 babies in a litter, experts say.
The newborns will spend one or two weeks with mom before leaving the nest.
What do baby rattlers look like?
Young rattlesnakes look much like their adult counterparts—just smaller, according to Sciencing.com
Distinguishable features include a “large, triangular head that tapers quickly” and “thick bodies that taper at both ends.”
Baby rattlesnakes are usually between 6 and 12 inches long, the website said.
In comparison, adults can grow up to 8 feet long.
The vipers typically have diamond-shaped patterns on their backs, although the colors vary depending on their environment, experts say.
“Baby snakes have the same markings as adults, and the patterns may be even brighter and more noticeable,” Sciencing.com reported.
Do baby rattlesnakes have rattles?
Baby rattlesnakes are born “with a small rattle or button” on their tails, though they may be unable to make that tell-tale buzz until new segments of their rattle develop, according to the California Fish and Wildlife Department.
Made from keratin, the rattles grow a new “segment” each time a rattlesnake sheds its skin or molts, which can happen multiple times a year.
The vipers, regardless of age, don’t always rattle before they strike, however.
“In reality, most rattlesnakes don’t rattle unless they’re very stressed out,” said Emily Taylor, a biological sciences professor at Cal Poly in San Luis Obispo.
“You’ll walk by them and they’re curled up like forbidden cinnamon rolls,” said Taylor, who oversees the university’s Physiological Ecology of Reptiles Lab. “Camouflage is their first line of defense.”
Where are snakes and their young usually found?
Rattlesnakes and their young can be found in every corner of California and thrive in various habitats, according to the state’s Department of Fish and Wildlife.
“Rattlesnakes can live in rural and urban areas, on riverbanks, in parks and at golf courses,” the department’s website says. “They may also turn up around homes and yards in brushy areas and under wood piles.”
The scaly creatures require rocky, open areas to bask, experts say. Habitats with places to hide and a nearby water source are also a must.
Should you come across one in the wild—or steps from your front porch—experts say it’s best to keep your distance.
What should I do if I’m bitten by a rattlesnake?
While they’re smaller in size, a bite from a baby rattlesnake can be just as dangerous if treatment isn’t swift.
Youngsters release less venom but their poison can be more potent, according to Taylor.
There’s also what’s known as a “dry bite” when no venom is released “because venom creation and use can be energetically expensive,” the state Department of Fish and Wildlife said.
Either way, experts say rattlesnake bites require immediate attention.
“Severe or even life-threatening symptoms may occur within minutes or couple of hours after a rattlesnake bite,” according to the California Poison Control System. “As rattlesnake bites can be deadly, your best bet is to call 911 and get to a hospital as soon as you can.”
Bites are rare, however, and typically occur when a rattlesnake feels threatened, experts say.
Otherwise, the snakes try their best to avoid human contact.
How do I stay safe?
Prevention is key when it comes to avoiding a rattlesnake bite, experts say.
The California Department of Fish and Wildlife offers several tips to avoid run-ins with the venomous vipers:
Stay alert when you’re outdoors.
Wear sturdy boots and loose-fitting long pants.
Stay on well-used trails, avoiding tall grass, weeds, and heavy underbrush.
Let others know where you’re going, when you plan to return, and carry a cellphone.
Use the buddy system.
2024 The Sacramento Bee. Distributed by Tribune Content Agency, LLC.
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It’s baby rattlesnake season in California: What to do and how to stay safe (2024, September 19)
retrieved 19 September 2024
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