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

Lunar Meteorite Preserves Evidence of Colossal Asteroid Strike

XRF map of 7.53 g slice of NWA 12593: calcium (Ca) and iron (Fe) illustrate the location and diversity of clasts; sulfur (S) highlights the location of cracks and terrestrial weathering. Image credit: Crow et al., doi: 10.1130/G54386.1.

Planetary scientists analyzing a lunar meteorite known as Northwest Africa (NWA) 12593 have uncovered evidence of an asteroid impact that occurred 3.5 billion years ago on the Moon, helping to reconstruct a period of intense bombardment that left lasting marks across the inner Solar System. XRF map of 7.53 g slice of NWA 12593: calcium (Ca) and iron (Fe) illustrate the location and diversity of clasts;...

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

Earth’s Earliest Animals May Have Thrived Too Easily to Evolve

Artist’s reconstruction of the Fractofusus community: the bottom right features a large Fractofusus around which there are 5 to 8 medium specimens clustered; each of the medium specimens also has small specimens clustered around them; the small specimens therefore form an independent double cluster pattern, namely clusters of clusters. Image credit: C.G. Kenchington.

Fossils from some of the oldest-known animals on Earth, dating from 574 million years ago (Ediacaran period), suggest that cloning, not competition, dominated the Ediacaran seas, slowing evolution until environmental stress helped drive the rise of sexual reproduction and a burst of biodiversity. Artist’s reconstruction of the Fractofusus community: the bottom right features a large Fractofusus...

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

Secret to Sloths’ Slow Life May Lie in Ancient ‘Jumping Genes’

The Linnaeus’s two-toed sloth (Choloepus didactylus) at London Zoo. Image credit: Dick Culbert / CC BY 2.0.

Along with armadillos and anteaters, sloths are members of Xenarthra, the only clade of placental mammals to have originated in South America. In new research, scientists sequenced and analyzed chromosome-level genomes of the Linnaeus’s two-toed sloth (Choloepus didactylus) and the southern anteater (Tamandua tetradactyla). They identified unusual genetic elements tied to energy production in the...

Geology

Lunar Meteorite Preserves Evidence of Colossal Asteroid Strike

XRF map of 7.53 g slice of NWA 12593: calcium (Ca) and iron (Fe) illustrate the location and diversity of clasts; sulfur (S) highlights the location of cracks and terrestrial weathering. Image credit: Crow et al., doi: 10.1130/G54386.1.

Planetary scientists analyzing a lunar meteorite known as Northwest Africa (NWA) 12593 have uncovered evidence of an asteroid impact that occurred 3.5 billion years ago on the Moon, helping to reconstruct a period of intense bombardment that left lasting marks across the inner Solar System. XRF map of 7.53 g slice of NWA 12593: calcium (Ca) and iron (Fe) illustrate the location and diversity of clasts;...