A study of more than 2,000 men found that exposure to common outdoor air pollutants during sperm development produced epigenetic changes that altered gene expression. Air pollution contains particulate matter and other chemicals that can affect human health. Previous research has linked it to respiratory and cardiovascular problems, but evidence of effects on reproductive biology has been limited. Researchers examined sperm samples from participants in a longitudinal health study conducted between 2020 and 2022. They measured DNA methylation patterns, which indicate whether genes are turned on or off, after the men were exposed to varying levels of pollutants. The analysis identified specific methylation changes in genes related to sperm motility and development. Men with higher exposure showed statistically significant differences in these patterns compared with those in lower‑exposure groups. Analysts said the findings suggest a possible mechanism by which environmental pollutants could impair male fertility, though they emphasized that the study does not prove causation. Other experts noted that additional research is needed to confirm the link and to determine whether the changes are reversible. The results highlight the need for stricter air‑quality standards and further investigation into how environmental factors influence reproductive health.
Breakthroughs from labs, observatories, and clinical trials worth your attention.
NASA released a draft planning document that outlines requirements for private space stations. The document, 246 pages long, lists more than 3,000 requirements, including a clause that the NASA chief information officer must approve all software purchases. Companies said they expected only a few hundred requirements and expressed surprise at the extensive list. The draft also leaves unclear how much of the proposed $1.5 billion funding will be available and how it will be divided among successful applicants. Phil McAlister, former NASA chief of commercial spaceflight, noted that the document resembles a cost‑plus contract placed inside a fixed‑price agreement and said NASA’s budget constraints suggest limited commitment to the program. The draft is open for comment from the space industry, and a final version could be issued in September, with contract awards possible next spring.
The Guardian's science section featured a puzzle describing a new television game show. The puzzle outlines a format in which two participants are chosen at the end of the program and placed in separate booths. According to the article, each participant will be given a task to solve while isolated, though the show's name and broadcast schedule have not been disclosed. The complete puzzle and game details are expected to be released in a later update.
A record heat wave across Europe in late June led to a surge in demand for air‑conditioning units, with retailers reporting sold‑out stocks of portable fans and AC devices.
A record heat wave across Europe in late June led to a surge in demand for air‑conditioning units, with retailers reporting sold‑out stocks of portable fans and AC devices.
Only about 20 % of European households currently have air‑conditioning, compared with roughly 90 % in the United States, and the International Energy Agency projects that two‑thirds of homes worldwide could own units by 2050.
Politicians in France and the United Kingdom have referenced air‑conditioning in broader policy debates, while the electricity required for cooling already accounts for about 3 % of global greenhouse‑gas emissions, comparable to the aviation sector.
Researchers are exploring solid‑state cooling methods that do not rely on traditional refrigerants, including elastocaloric systems using nickel‑titanium alloys and semiconductor‑based heat pumps.
Paul Motzki of Saarland University and his EU‑funded consortium are testing a prototype that can lower temperatures by 5–10 °C, while companies such as Mimic Systems, Magnotherm, Barocal and Exergyn are developing alternative technologies that operate without refrigerants.
Miranda of the University of Oxford and IEA analyst Fabian Voswinkel advocate a cooling hierarchy that prioritizes passive measures—such as shading, reflective surfaces and natural ventilation—before deploying active cooling for critical facilities like schools and hospitals.
The transition to new cooling technologies will depend on private investment and public support, and large‑scale deployment is expected within the next few years.
LARES‑2, a 40‑centimeter solid Inconel sphere launched in July 2022, carries 303 retroreflectors and weighs 294.8 kg, giving it the lowest area‑to‑mass ratio of any satellite in medium‑Earth orbit. The satellite was placed in a 12,265‑kilometer altitude orbit by a Vega‑C rocket and is tracked by ground‑based laser ranging, achieving position measurements accurate to about 1 mm.
Ciufolini and colleagues combined data from LARES‑2 with observations of LAGEOS, a NASA laser‑ranged satellite launched in 1976, selecting orbital inclinations that sum to approximately 180 degrees. This geometric arrangement cancels the dominant Newtonian perturbations caused by Earth's equatorial bulge, isolating the relativistic Lense‑Thirring signal.
Over a 1,050‑day period encompassing one full precession cycle, the team removed the K1 lunisolar tide and other periodic tidal effects, leaving a steady drift of 61.3 milliarcseconds per year in the combined orbital planes. The measured value agrees with general relativity predictions according to the team, within an uncertainty of 0.2 percent, corresponding to about one or two parts per thousand.
The precision limits the range of allowed variations in Chern‑Simons theory, a modification of general relativity proposed to connect quantum mechanics and gravity, without disproving the theory outright. The same data also refine the quantification of the lunar‑solar tidal influence on Earth's gravity field, which may improve models used in seismology and earth science.
Ciufolini noted that laser‑ranged satellites such as LARES‑2 can remain operational for centuries, allowing progressively tighter constraints on frame dragging as more data accumulate.
Rocket Factory Augsburg will attempt its second flight of the RFA One launch vehicle from SaxaVord Spaceport in Scotland in an August window opening on August 10, after a first stage failure in a static fire test in 2024. The company had previously targeted a July launch but has adjusted its schedule amid uncertainties. In Asia, China’s Long March 10B is scheduled for a demonstration flight on July 10 from Wenchang, featuring a reusable first stage intended to land on a recovery ship. Skyroot is expected to attempt its first launch on July 11. The air‑launched Pegasus XL completed its final mission on July 4, delivering a half‑ton Link satellite for Katalyst Space Technologies to support NASA’s Swift mission. Maritime Launch Services announced that Isar Aerospace will construct a launch pad at Nova Scotia’s Canso site for its Spectrum rocket, with construction slated to begin this year and launches expected by 2028. United Launch Alliance’s Atlas V performed its ninth flight for Amazon’s Leo broadband constellation on July 4, marking the 110th overall mission for the vehicle, and six more Atlas Vs are slated for Boeing Starliner crew missions, though the exact number remains uncertain. ArianeGroup and Beyond Gravity signed a contract for 27 payload fairings for Ariane 6 flights 16 to 42, with production of 20 long and seven short fairings to commence at the end of 2026. SpaceX’s Falcon 9 booster B1067 completed its 36th flight on July 4, adding 29 Starlink satellites to orbit, while a test of an upgraded 200‑kilonewton Vinci engine for Ariane 6’s Block 2 configuration was conducted at Germany’s DLR facility. Additional developments include Impulse Space’s Helios kick stage for the U.S. Space Force and concerns that SpaceX may limit Falcon 9 availability for commercial rideshare missions beyond 2028.
Shell and its partners unveiled the Triple 10 Challenge Concept Car at HORIBA MIRA's testing facility in Nuneaton, Warwickshire, on the first day of the demonstration. The vehicle, built from scratch in 18 months, was designed to showcase advanced electric vehicle technology, including a battery that can charge from 10% to 80% in ten minutes and a range of about 200 kilometres with a battery half the size of comparable cars. Parts of the motor and battery are immersed in a new Shell battery coolant fluid intended to keep components cool during rapid charging. The car uses recycled materials and reduced weight to achieve its range. Denis Gorman of RML Group explained that the fluid circulates through the battery cells to enable high charging speeds while staying within safe limits. Toby Rockstroh of Shell said the project had attracted interest from manufacturers and that similar technology could appear in future production EVs. HORIBA MIRA engineers noted technical challenges such as fluid compatibility with rubber hoses but said the demonstration highlighted the potential of the cooling system. The prototype was tested in high temperatures, raising concerns about the durability of 3D‑printed plastic wing mirrors, though the team said production models would address such issues. The vehicle remains a demonstrator with no immediate timeline for showroom availability.
Wally Funk, a former pilot and the last surviving member of the Mercury 13, died at age 87. Born Mary Wallace Funk on February 1, 1939, in Las Vegas, New Mexico, she earned a pilot’s license at age 16, graduated from Stephens College with an associate degree, and obtained a bachelor’s degree in secondary education from Oklahoma State University while acquiring multiple flight ratings. She joined the First Lady Astronaut Trainees, known as the Mercury 13, in the early 1960s, undergoing the same physiological tests as NASA’s Mercury Seven astronauts. Funk later became a professional aviator, instructing U.S. Army officers and serving as the first female flight instructor at a U.S. military base. In 1971 she earned the FAA flight inspector rating, becoming the first woman to do so, and in 1974 she was hired by the National Transportation Safety Board as its first female air safety investigator. She worked as chief pilot for five aviation schools, training thousands of students across the United States. Funk was inducted into the Texas Aviation Hall of Fame in 2024 and received the National Air and Space Museum’s Michael Collins Trophy for Lifetime Achievement in 2022. She was recognized with a Guinness World Record for being the oldest woman in space and will be posthumously inducted into the International Space Hall of Fame later this year. Her death marks the end of a generation of women who pursued astronaut training outside the formal NASA program, and her contributions to aviation safety and spaceflight history will be commemorated through ongoing research and museum exhibits.