Astronomy

Astronomers Scan Interstellar Object 3I/ATLAS for Alien Radio Signals

This image from the Subaru Telescope shows the interstellar comet 3I/ATLAS. Image credit: NAOJ.

Using the SETI Institute’s Allen Telescope Array, a 42-element radio interferometer at Hat Creek Radio Observatory in Hat Creek, California, astronomers probed 3I/ATLAS for artificial radio transmissions but found only human-made interference. This image from the Subaru Telescope shows the interstellar comet 3I/ATLAS. Image credit: NAOJ. 3I/ATLAS is the third confirmed object from another star...

Space Exploration

Jupiter Accelerates Electrons to Near-Light Speed, Offering Clues to Cosmic Ray Origins

As planets and stars travel through the streams of charged particles flowing across space, their magnetic fields act like obstacles; incoming particles are slowed and deflected, forming a boundary called the bow shock; just ahead of this boundary lies the foreshock, a variable region where magnetic conditions can accelerate some particles to nearly the speed of light. Image credit: Ben C. Smith, Johns Hopkins Applied Physics Laboratory.

The giant planet’s bow shock isn’t just deflecting the solar wind, it’s acting as a powerful particle accelerator, firing electrons to relativistic energies of at least 1 MeV, according to a new analysis of data from NASA’s Juno spacecraft. As planets and stars travel through the streams of charged particles flowing across space, their magnetic fields act like obstacles; incoming particles...

Archaeology

Spanish Cave Sanctuary Reveals More Than 11,500 Years of Activity

Sala Keimada, a chamber of Cueva Palomera in Burgos, Spain. Image credit: Ortega-Martínez et al., doi: 10.1016/j.jasrep.2026.105818.

New radiocarbon dates from Sala Keimada, a hard-to-reach chamber of Cueva Palomera in the province of Burgos, northern Spain, suggest that generations of people returned to the sacred space from the end of the Ice Age through the Iron Age, leaving behind art, structures and offerings. Sala Keimada, a chamber of Cueva Palomera in Burgos, Spain. Image credit: Ortega-Martínez et al., doi: 10.1016/j.jasrep.2026.105818. “Cueva...

Paleontology

Fossil Discovery in Patagonia Reveals New Species of Horned Turtle

An artist’s impression of Patagoniaemys aeschyli. Image credit: Nawel Vazquez / Museo Argentino de Ciencias Naturales ‘Bernardino Rivadavia’ / CONICET.

Paleontologists have identified a new species of meiolaniform turtle from northern Patagonia, Argentina, that lived during the Maastrichtian age, just before the asteroid-triggered mass extinction that wiped out all non-avian dinosaurs. An artist’s impression of Patagoniaemys aeschyli. Image credit: Nawel Vazquez / Museo Argentino de Ciencias Naturales ‘Bernardino Rivadavia’ / CONICET. The...

Physics

Is Dark Energy Unnecessary? Mathematicians Challenge Standard Cosmological Model of Universe

This artist’s impression shows the evolution of the Universe beginning with the Big Bang on the left followed by the appearance of the Cosmic Microwave Background. The formation of the first stars ends the cosmic dark ages, followed by the formation of galaxies. Image credit: M. Weiss / Harvard-Smithsonian Center for Astrophysics.

Mathematicians from University College London and the University of California, Davis, have published a mathematical proof that the Universe’s accelerating expansion can be explained without dark energy, dealing a serious blow to the Lambda-cold dark matter model — the standard cosmological model that has stood for nearly 30 years. Alexander et al. provide a mathematical proof that instabilities...

Medicine

Daily Glass of Fruit Juice May Lift Your Mood: Study

People who drink a glass of 100% fruit juice or a smoothie each day as part of the UK’s 5-a-day healthy eating guidance see improvements in their mental wellbeing. Image credit: Joseph Mucira.

In a small randomized trial in the United Kingdom, adults who added a serving of 100% fruit juice or a smoothie to a healthier diet reported lower depression scores after four weeks. People who drink a glass of 100% fruit juice or a smoothie each day as part of the UK’s 5-a-day healthy eating guidance see improvements in their mental wellbeing. Image credit: Joseph Mucira. “While most people...

Genetics

Homo erectus May Have Co-Existed with Denisovans in East Asia

This is an artist's reconstruction of Homo erectus. Image credit: Yale University.

Scientists have extracted and analyzed proteins from the tooth enamel of six Homo erectus individuals who lived in China roughly 400,000 years ago, offering an unprecedented glimpse into the genetic makeup of one of humanity’s most successful and far-ranging ancestors. Their results suggest that Homo erectus may have carried genetic variants that were later passed to Denisovans and eventually...

Geology

Acheulean Toolmakers Chose Their Stone with Surprising Precision

A reconstruction of Homo longi in his habitat. Image credit: Chuang Zhao.

Geochemical analysis of 780,000-year-old stone tools from Israel suggests Acheulean (or Acheulian) hominins repeatedly sought specific basalt sources, revealing sophisticated planning and deep knowledge of their landscape. The basalt slabs at the Acheulean site of Gesher Benot Ya‘aqov in Israel were used for biface production, and most of their knapping took place away from the site. Image credit:...