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A rise in microplastic contamination in human brain tissue has been reported, with findings indicating an increase over recent years. Concerns about potential health impacts have been raised, as microplastics and nanoplastics have been detected in significant amounts. Research suggests that individuals with dementia had even higher concentrations, though the causation remains unclear. While the presence of these particles has been established, debates around research methodology and the accuracy of findings continue within the scientific community.

Study Highlights Rising Microplastic Levels

According to a study published in Nature Medicine on February 3, the concentration of microplastics in human brain tissue has risen by approximately 50 percent between 2016 and 2024. Researchers found that in those who had died with dementia, microplastic levels were nearly six times higher than in individuals without the condition. Comparisons with samples dating from 1997 to 2013 showed a continuous rise in microplastic accumulation over time.

The study examined brain, liver, and kidney tissue from 28 people who died in 2016 and 24 individuals from 2024. The highest concentrations were found in brain tissue, with microplastic levels ranging from seven to 30 times greater than in the kidney and liver. The presence of polyethylene, commonly used in food packaging, was most notable, accounting for 75 percent of the detected plastics.

Potential Impact on Brain Health

In an email to Live Science, study co-author Matthew Campen, a toxicologist at the University of New Mexico, stated that the accumulation of microplastics could potentially disrupt blood flow in brain capillaries or interfere with neural connections. While concerns about links to dementia exist, no direct causation has been established.

Concerns Over Research Methods

Skepticism regarding the study’s methodology has been expressed by some scientists. Speaking to Live Science, Oliver Jones, a professor of chemistry at RMIT University in Melbourne, questioned whether the results were biologically plausible. He pointed out that the main analytical method used, pyrolysis-gas chromatography-mass spectrometry, might have led to overestimated plastic concentrations due to interference from brain fats.

Despite these concerns, toxicologist Emma Kasteel from Utrecht University, in a statement to Live Science, stated that while the exact levels may be uncertain, the confirmed presence of microplastics in the brain warrants further investigation.

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ISRO Unveils World’s Largest 10-Tonne Vertical Mixer for Solid Propellants

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ISRO Unveils World’s Largest 10-Tonne Vertical Mixer for Solid Propellants

A significant advancement in India’s space technology has been achieved with the development of a 10-tonne vertical planetary mixer, the largest globally for solid propellant production. Designed and manufactured through a collaboration between the Indian Space Research Organisation (ISRO) and the Central Manufacturing Technology Institute (CMTI), this new equipment is expected to enhance efficiency and safety in the manufacturing of solid rocket motors. The handover ceremony took place on February 13 at CMTI, Bengaluru, where Satish Dhawan Space Centre (SDSC) Director A. Rajarajan received the mixer in the presence of ISRO Chairman S. Somanath and CMTI Director K. Prasad.

Enhancing Solid Propellant Production

As reported by ISRO, according to ISRO, the new vertical planetary mixer is a critical addition to India’s space propulsion systems. Solid propellants, which serve as the backbone of rocket motors, require precise and controlled mixing due to the sensitivity of the materials involved. The newly developed mixer, weighing approximately 150 tonnes with dimensions of 5.4 metres in length, 3.3 metres in breadth, and 8.7 metres in height, will improve the consistency, quality, and scalability of solid propellant production.

Towards Self-Reliance in Space Technology

As part of India’s push for self-reliance in critical technologies, the Department of Space has undertaken multiple initiatives to develop indigenous manufacturing capabilities. The realisation of this mixer underscores India’s increasing capability in aerospace engineering and manufacturing. The equipment has undergone successful factory-level acceptance tests and is set to play a key role in advancing the country’s space transportation systems.

Future Implications for ISRO’s Missions

With an emphasis on improving safety and productivity, the newly developed mixer is expected to streamline the process of solid propellant preparation for future ISRO missions. The technology is set to support upcoming launch vehicle developments, reinforcing India’s position in the global space industry.

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NASA Lowers Risk of Asteroid 2024 YR4 Impact, Now Just 0.28 percent Chance

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NASA Lowers Risk of Asteroid 2024 YR4 Impact, Now Just 0.28 percent Chance

Concerns regarding asteroid 2024 YR4 have diminished, as NASA has revised the probability of its impact on Earth in 2032 from 1 in 32 to 1 in 360. The asteroid, which has an estimated diameter of 55 meters, was initially considered the most hazardous object on NASA’s Center for Near Earth Object Studies (CNEOS) Sentry Risk Table. New observational data gathered between February 18 and February 20 led to a reassessment, significantly lowering the projected threat level. According to NASA, the asteroid now holds a 99.72 percent chance of missing Earth entirely.

Orbital Data Leads to Reassessment

According to information provided by NASA, the latest findings were based on additional telescope observations, refining previous predictions. The data confirmed that the asteroid’s trajectory has been better understood, resulting in its classification at Level 1 on the Torino Scale, a system used to gauge the risk posed by near-Earth objects. Richard Binzel, the creator of the Torino Scale, told Space.com that further observations are expected to move 2024 YR4 to Level 0, indicating no cause for concern.

Comparisons with Other Asteroids

Despite the significant drop in risk, asteroid 2024 YR4 remains at the top of the Sentry Risk Table. The next most concerning object is 1950 DA, with a 0.039 percent chance of impacting Earth in the year 2880. Experts have emphasized that continued monitoring will provide further clarity on the asteroid’s path as it makes another approach in 2028.

Scientific Observations and Future Monitoring

David Rankin, an astronomer from the Catalina Sky Survey, explained that minor variations in measurement precision can cause large shifts in projected trajectories. Speaking to Space.com, he noted that uncertainties in an asteroid’s position are similar to moving a long stick slightly at one end, causing dramatic shifts at the other. Rankin reassured that further data collection would likely continue to reduce any remaining impact probability.

NASA has also noted a minor possibility that 2024 YR4 could impact the Moon, but the likelihood remains low. As the asteroid moves away from Earth, it will not be visible again to ground-based telescopes until 2028, when additional observations will refine its projected path. Scientists remain confident that its most probable outcome is to continue its orbit around the Sun without incident.

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Blue Origin NS-30 Crew Announced: Everything You Need to Know

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Blue Origin NS-30 Crew Announced: Everything You Need to Know

The next suborbital space tourism mission by Blue Origin, known as NS-30, is set to take place at an undisclosed date. This will be the 30th launch of the company’s New Shepard rocket and its 10th crewed mission. The flight will take off from Blue Origin’s West Texas facility, carrying six individuals on a brief journey to suborbital space. The names of five crew members have been announced, while the identity of the sixth passenger remains undisclosed.

Crew Members and Their Backgrounds

According to the official announcement, the five confirmed passengers include Lane Bess, Jesús Calleja, Elaine Chia Hyde, Richard Scott, and Tushar Shah. Lane Bess, founder of Bess Ventures and Advisory, will be making his second journey with Blue Origin, having previously flown on the NS-19 mission in December 2021.

Jesús Calleja, a Spanish television host and adventurer, has explored extreme environments across the globe, including the Seven Summits and polar regions. Elaine Chia Hyde, an entrepreneur, physicist, and pilot, was born in Singapore, raised in Australia, and currently resides in Florida. Richard Scott serves as a reproductive endocrinologist and holds an adjunct professorship at Yale University and the University of South Carolina School of Medicine. Tushar Shah is a hedge fund partner based in New York City.

Mission Overview and Past Flights

The NS-30 mission will provide passengers with an approximately 10 to 12-minute experience, including a brief period of weightlessness and a view of Earth from suborbital space. The New Shepard capsule will return to Earth via parachute. The company has not disclosed ticket prices for the flight. Blue Origin’s first crewed mission occurred on July 20, 2021, with Amazon founder Jeff Bezos among the passengers. Further details regarding NS-30’s launch schedule and the identity of the final crew member are expected to be released in due course.

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