Lack of sleep can cause significant impacts on cognitive performance the following day. A preclinical study, published in the scientific journal Neuropsychopharmacology, indicated that sleep deprivation deteriorates communication between neurons in the hippocampus, a brain area crucial for the formation and consolidation of new memories. In this context, caffeine has shown potential as an aid against this negative effect.
Researchers from the National University of Singapore conducted the experiment, interrupting the sleep of mice for a period of five hours. Subsequently, the animals had free access to caffeine mixed in drinking water for seven days. The electrical brain activity of the rodents was monitored to evaluate the results of the intervention, which pointed to signs of recovery in the brain circuits after treatment.
Ana Aguilar, a neurologist and sleep medicine specialist at Einstein Israelite Hospital, states that there is solid evidence that sleep is vital for consolidating memories, as it is during this time that the brain organizes daily information and strengthens neural connections for more lasting storage. During nighttime rest, the brain reinforces connections and promotes essential changes for brain plasticity. When rest is insufficient or interrupted, this process is affected, harming both learning and memory consolidation.
Aguilar details that long periods of wakefulness lead to the accumulation of adenosine in the brain, acting as an inhibitor of neuronal activity. Caffeine, according to the study, competes with this adenosine for receptors, decreasing the inhibitory effect and managing to mitigate some of the damage caused by sleep deprivation.
It is important to note that, since this is animal research, the findings do not confirm the effects of caffeine in humans. Luciana Palombini, a pulmonologist and specialist from the Sleep Institute affiliated with the Federal University of São Paulo (Unifesp), emphasizes that other factors must be considered, given that sleep deprivation affects cognitive function through various mechanisms, including the impairment of the lymphatic system responsible for brain cleansing.
Palombini advises that continuous use of caffeine to maintain alertness may indicate that the quality or quantity of sleep is inadequate and requires investigation. She emphasizes the importance of combating the current global epidemic of sleep deprivation, caused by the lack of prioritization of rest. Ideal consumption should be moderate, with general recommendations of up to 400 milligrams of caffeine daily, which is equivalent to about four cups of brewed coffee, although the guidance must always be personalized according to each individual's health conditions.
There are rumors that Samsung intends to continue its line of tri-fold smartphones in 2027. This development is reportedly underway, and the company has already initiated contact with component suppliers.
The new generation could feature a total of four foldable models, including a new TriFold, which would be launched simultaneously with the Galaxy Z Fold 9, Galaxy Z Fold 9 Ultra, and Galaxy Z Flip 9. These models would follow the announcement of the Galaxy Z Fold 8 and Galaxy Z Flip 8.
The Galaxy Z TriFold was introduced as an experimental line at the end of 2025. It occupied a market niche previously dominated only by the Huawei Mate XT Ultimate Design, notable for having three internal screens. The device was equipped with top-tier specifications, such as the Snapdragon 8 Elite Mobile Platform for Galaxy chip, a 10-inch screen with up to 120Hz refresh rate, and a 5,600 mAh battery.
Due to its high cost, the TriFold was sold for US$ 2,899.99, while the Huawei competitor cost between R$ 32,999 and R$ 39,999 in Brazil. Despite the high price, limited demand in the United States was enough to sell out stock early this year.
In contrast to the news about the TriFold, there are less optimistic rumors regarding the Galaxy Z Flip. A Chinese expert, Ice Universe, suggests that the eighth generation of the foldable, recently presented at Galaxy Unpacked, might be the last. GSMArena points out that the constant increase in RAM prices and low competition in the sector could lead to the end of this line, which gained popularity for bringing the design of devices that open and close with full front screens, similar to the Motorola Razr line.
If the Galaxy Z Flip is not discontinued, Samsung plans to offer an even larger portfolio in 2027, featuring four foldables and four more devices from the Galaxy S series: Galaxy S27, S27 Plus, S27 Pro, and S27 Ultra.
Astronomers have obtained the most robust proof that Betelgeuse, one of the most famous stars in the sky, has a stellar companion, concluding decades of observation attempts.
This discovery was made using the Very Large Telescope (VLT), belonging to the European Southern Observatory (ESO). The direct visual record provided an answer to an old question regarding the Orion giant and inaugurates a new area of investigation into the star's fate, including its potential explosion as a supernova.
Betelgeuse, located in the constellation Orion, has always attracted attention due to its reddish glow and luminosity variations recorded over time. Despite being an object of study for generations, the star continued to present new aspects.
The research team, led by French scientist Miguel Montargès from the Observatoire de Paris-PSL, obtained the clearest image ever captured of the probable Betelgeuse B, the star orbiting the main body. This finding was formally published in the journal Astronomy & Astrophysics.
Montargès stated that the data demonstrates that Betelgeuse is not an isolated star but is accompanied by a discreet stellar companion. The astronomer himself expressed surprise at the results, reporting that he reacted intensely upon seeing the processed images during the analysis of the records.
The possibility of finding this companion arose after two studies published in 2024, which pointed to December of that year as the ideal time for detection, as this was when the secondary star would be farthest from Betelgeuse.
The team took advantage of this visibility period with the VLT and dedicated months to analyzing the collected data. The results revealed that Betelgeuse B has a mass greater than previously assumed; it is estimated to be between two and three times the mass of the Sun.
The central results of this investigation include obtaining the clearest image of Betelgeuse B to date, the direct confirmation of the existence of the partner star, the estimation of its mass between two and three solar masses, and the reinforcement of a theory that has been debated for approximately a century.
Montargès emphasized the importance of the discovery, commenting that it is remarkable to be able to identify a nearby companion that is brighter and more massive than the Sun, orbiting such an extensively studied star.
The image was captured by the SPHERE instrument, installed on the VLT, located in the Atacama Desert, Chile. Co-author Anthony Boccaletti explained that the technologies originally developed for exoplanet location were also effective in finding a companion around a giant and evolving star.
Despite the solidity of the current evidence, researchers plan to conduct a new observation in a year, when Betelgeuse B will be positioned on the opposite side of the primary star, with the aim of definitively confirming its presence. The subsequent challenge will be to determine whether this companion influences the evolution of Betelgeuse and its future supernova event, which, according to Montargès, remains an open question for future research.
For those who do not yet have a smart speaker at home or wish to expand their voice assistant network, this is a good time to acquire an Echo Dot. Three options of the Echo Dot were presented available on Amazon, each in a distinct color, so that the consumer can select the one that best harmonizes with their space. All these models offer priority access to Alexa+, which represents the enhanced version of the Amazon assistant.
The black Echo Dot model is ideal for environments that require discretion and elegance. This device has powerful and vibrant sound for its size, connecting via both Wi-Fi and Bluetooth. This allows the user to execute voice commands to Alexa, controlling smart devices, setting alarms, and playing music.
The white version of the Echo Dot complements decorations with a lighter and more minimalist aesthetic. Its audio quality features better defined bass than would be expected from a compact speaker, and Wi-Fi and Bluetooth connectivity ensures great versatility of use. With Alexa managing tasks and early access to Alexa+ included, it is possible to organize the routine, listen to podcasts, and automate the home without needing to move.
For those looking to add a colorful element to the environment, the blue Echo Dot is suggested. In addition to its distinct visual appeal, it shares all the capabilities of the other variants: robust sound, Wi-Fi and Bluetooth connectivity, and full integration with Alexa. The benefit of early access to Alexa+ gives the user a more sophisticated assistant, capable of understanding more elaborate contexts and responding to requests more naturally.
It is important to note that stock levels on Amazon tend to fluctuate significantly, and promotions like this can change at any time. If any of these models spark interest, it is recommended to access the link to ensure acquisition before commercial conditions change.
