Scientists warn that the Amazon Rainforest has experienced a loss of the rainfall necessary to sustain it, pushing the world’s largest tropical ecosystem toward a potential tipping point.
A recent study published in Nature Communications indicates that deforestation is causing a significant decline in rainfall during the Amazon’s dry season, thereby increasing heat across the region.
Researchers suggest these changes could signify “early signs of biome destabilization,” implying that the forests are beginning to struggle to maintain their balance.
The study analyzed satellite and climate data from 1985 to 2020, encompassing an area of 2.6 million km² (1,000,000 square miles) in Brazil’s Amazon. This is nearly four times larger than Texas.
The data revealed that dry season rainfall has decreased by approximately 21mm (0.8 inches), with about three-quarters of this decline directly associated with deforestation.
During the same period, maximum daily temperatures increased by around 2°C (3.6°F), with 16.5% of this rise attributable to forest loss, while the remainder results from global climate change.
Deforestation contributes to reduced rainfall, while increased methane and carbon dioxide levels result from climate change – Source: Machado et al., Nature Communications (2025)
Plants play a crucial role in the Amazon’s rain cycle by extracting water from the soil and releasing it through a process known as transpiration.
When trees are removed, this cycle weakens, leading to fewer clouds and less rainfall. Consequently, the forest becomes hotter and drier, creating a harmful feedback loop.
If the Amazon reaches a tipping point, it may no longer be able to sustain itself, resulting in a rapid and irreversible collapse of the ecosystem and converting the region into a savanna.
This shift would significantly impact the entire water cycle in South America and release the carbon stored in the rainforests.
“These findings underscore the necessity of preserving and restoring Amazonian forest cover as a vital strategy for mitigating climate change and ensuring ecosystem stability,” the scientists conclude.
Lightweight based computer chip made by Pace, LightElligence
Light Ergens
Computers that use light rather than data to represent and manipulate data can reduce data center power requirements and at the same time speed up calculations. Two studies published today describe breakthroughs in performing real problems on light-based computers, creating techniques that are on the verge of commercial applications, the researchers say.
Electronic computers have historically followed Moore’s law, as we all use today. The power of the machine doubled every two years. However, in recent years, progress has slowed down as transistor miniaturization reaches its fundamental physical limits.
Researchers are working on many potential solutions, including quantum and photonic computing. However, Quantum Computing still struggles to achieve true utility, but Photonic Computing has reached the point where chip designs like those set in two new research are performing authentic calculations. In addition, these photonic chips can be manufactured using the same factory that manufactures silicon chips for electronic computers.
Photonic computers offer greater potential benefits than electronic computers. One is that photons travel faster than electrons do in the circuit, allowing for faster calculations and less pauses between each step of the calculation. Second, photons move without resistance and are rarely absorbed by the material on which the chip is made, allowing the same job to be performed using less energy than an electric computer that requires energy-intensive cooling.
In its research, Lightelligence, a Singapore-based company, shows that a device called a Photonic Arithmetic Computing Engine (PACE), which combines photonic and microelectronic chips, can successfully execute ISING problems that apply directly to the logistics industry and many other areas.
Meanwhile, US startup LightMatter claims that its own chip can run AI model BERT to create text in Shakespeare’s style. New Scientist Could not reach Lightmatter due to comments.
Bo Peng At LightElligence, the sector is increasingly busy with start-ups and technology is rapidly maturing. “We’re more or less pre-production,” says Peng. “It’s more like a real product than just a lab demonstration.”
Just as the world of quantum computers is trying to demonstrate the benefits of quantum, quantum machines are the point where classical computers can provide useful things. He won’t draw when this will happen, but says that this technology is closer to being ready for commercial applications – perhaps it works as a photonic chip that works with the electric chip, rather than completely replacing them to handle the specific tasks that it can provide boost.
Needless to say, hardware based on the research and Lightelligence PCI Express format. This is a standard motherboard add-on format for desktop computers that allow you to add graphics cards and other devices. Company devices can already be added to any commercial desktop, but require the appropriate software to communicate.
Robert Hadfield At the University of Glasgow in the UK, two studies show that “it’s a kind of boiling area.” “This is close to the point where the industry may consider photonic processors a viable alternative,” he says. “It’s really interesting to see how mature this architecture has become. These are photonic chips manufactured in one of the world’s leading foundries, so they can be expanded for mass production.”
Stephen SweeneyThe University of Glasgow also says that they have already seen optical data transmissions roll out around the world, with optical optical computing approaching too. “With Photonics, you can do things at a lower loss than electronics can,” says Sweeney. “And if you need to be able to do a huge amount of calculations, you need to start looking at it.”
Those who suffer from the throbbing pain of migraines know how challenging everyday tasks can become. However, a new medication, if taken at the first signs of a migraine, could potentially prevent the onset of debilitating symptoms.
The drug, ubrogepant, has recently been approved for use in the US and is available in the UK, although not covered by the NHS. A study funded by AbbVie, the manufacturer of ubrogepant, revealed that taking the pill at the first indication of a migraine can prevent severe headaches from developing.
Before a migraine attack, some individuals experience early warning signs like sensitivity to light and sound, fatigue, neck pain, stiffness, and dizziness. Identifying these symptoms can help in timely treatment with ubrogepant to inhibit the protein CGRP in the brain responsible for migraines.
The research conducted by Dr. Richard B. Lipton and his team involved 518 participants who were able to predict the onset of migraines within a few hours. Those who took ubrogepant reported being able to function normally two hours after ingestion, with fewer limitations on their activities even after 24 hours.
While promising, ubrogepant may not be effective for those who experience sudden migraine attacks without warning signs. Regardless, experts view this development as a positive step in migraine treatment, providing hope for those who suffer from this common but debilitating condition.
About our experts:
Dr. Steven Ross, a professor and vice chair of clinical affairs in the Department of Neurology at Pennsylvania State University College and Penn State Health, USA, has conducted extensive research in neurology, medicine, and pediatric emergency medicine.
A team of physicists at the University of California, Berkeley has developed the most sophisticated instrument ever designed to search for dark energy, the mysterious force that is accelerating the expansion of the universe.
The results of their experiment were published today in a prestigious journal. Nature – targets a hypothetical particle known as the chameleon, which could hold the key to unlocking this mysterious cosmic force.
First identified in 1998, dark energy makes up about 70 percent of all matter and energy in the universe, and despite many theories, its true nature remains a mystery.
One leading hypothesis is that there is a fifth force that is distinct from the four fundamental forces known in nature (gravity, electromagnetism, and the strong and weak nuclear forces).
This power is thought to be mediated by particles known as chameleons due to their ability to hide in plain sight.
In an experiment at the University of California, Berkeley, Professor Holger Muller utilizes an advanced atom interferometer combined with an optical lattice.
If that sounds technical, it is. Essentially, this setup allows for precise gravity measurements by holding free-falling atoms in place for a set period of time.
Physicists at UC Berkeley have clamped a small cluster of cesium atoms (the pink blob) in a vertical vacuum chamber and split each atom into a quantum state where half of the atom is close to the tungsten weight (the shiny cylinder) and the other half (the split sphere below the tungsten) is close to the tungsten weight. – Image credit: Cristian Panda/UC Berkeley
The longer we can keep the atoms there, the greater our chances of finding (or not finding) a trace of the chameleon.
“Atom interferometry is the technology and science that exploits the quantum properties of particles – their properties as both particles and waves. We split the waves so that the particles take two paths at the same time, and then we interfere with them at the end,” Muller said.
“The waves are either in phase and add, or out of phase and cancel each other out. The key is that whether they are in phase or out of phase depends very sensitively on the quantities you want to measure, such as acceleration, gravity, rotation, or fundamental constants.”
Whereas previous experiments have only been able to move atoms for a few milliseconds at a time, the new device can keep them in motion for much longer periods – from seconds to tens of seconds – a major improvement that improves the most precise measurements by a factor of five.
In a recent paper published in the journal Natural Physics Muller and his colleagues extended the hold time to a whopping 70 seconds.
To reveal whether chameleon particles are indeed the dark energy mastermind, scientists would need to find holes in the outcomes predicted by the accepted theory of gravity — something no one has managed to do since Isaac Newton formulated it 400 years ago.
Muller and his team found no deviations from Newtonian gravity in their recent tests, suggesting that if chameleons exist, their effects are quite subtle.
Still, the researchers are optimistic: The improved precision of their instruments means future experiments may provide the evidence needed to confirm or disprove the existence of chameleons and other hypothesized particles that contribute to dark energy.
About the Experts
Holger Muller At the age of 14, he successfully filed his first patent. He then wrote his undergraduate thesis under the supervision of Jürgen Mullinek at the University of Konstanz in Germany. He graduated from the Humboldt University in Berlin with Achim Peters as his supervisor. Müller received a fellowship from the Alexander von Humboldt Foundation and joined Steven Chu’s group at Stanford University as a postdoctoral researcher. In July 2008, he joined the Physics Department at the University of California, Berkeley, where he is currently a Professor of Physics and Principal Investigator. He is currently the Principal Investigator of his research group, the Müller Group.
Reliance is reportedly close to agreeing to buy Disney’s India operations as Mukesh Ambani’s oil telecom empire looks to expand its digital and television assets.
Disney values its India operations at about $10 billion, while Reliance pegs its assets at $7 billion to $8 billion, Bloomberg News reported on Monday. According to the report, a deal could be signed and announced as early as next month.
Reliance said in an earlier statement that the company is constantly evaluating properties for acquisition.
In 2019, Disney acquired 21st Century Fox’s entertainment assets for $71.3 billion, a move that was significantly strengthened by the addition of Star India.
The deal was critical to Disney’s global streaming expansion, giving Disney broadcast and streaming rights to Indian Premier League cricket matches, a number of multilingual television channels, and an interest in a Bollywood film production company. At the time of acquisition, Star’s Hotstar had approximately 150 million monthly active users.
Hotstar dominated India’s video streaming world for several more quarters, but its popularity grew after Reliance-backed Viacom18 secured five-year rights to stream IPL cricket matches for about $3 billion, and the situation has since changed. became tapered. Disney paid $3 billion for the same five-year rights to air the content on television.
Reliance has poached a number of top leadership and engineering talent to strengthen JioCinema over the past year, bringing premium content from HBO and NBC to its on-demand streaming service.
Disney’s Hotstar, which lost around 20 million subscribers this year as consumers flocked to JioCinema to watch IPL matches, has turned to the ongoing Cricket World Cup in hopes of winning back customers. Streaming for free to mobile viewers. Earlier this month, the Disney Streamer app took back the global on-demand video streaming record from JioCinema when a cricket match drew 35 million concurrent viewers. During Sunday’s India vs. New Zealand match, concurrent viewership jumped to 43 million viewers, breaking its own record.
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