fraction of a pixel on both telescopes. It would not have been possible to find this black hole without them.” The orbital period of the binary is roughly 94 years, making it the longest‑period black‑hole system identified so far. The team’s analysis...

repurposed as a salt warehouse in the 18th and 19th centuries. Heavy salt deposits permeated the stonework during that period. The situation worsened after a 1970s renovation that installed a heated concrete slab; the heat caused the trapped salt to...

the object—sometimes referred to as Tempel 2—has completed dozens of revolutions around the Sun, classifying it as a short‑period comet with an orbital period of roughly five years. The comet follows a relatively tight orbit compared with long‑period...

in Environmental Archaeology, tracks burial habits from the Twenty-fifth Dynasty (754–656 BCE) through the Ptolemaic period (305–30 BCE). By mapping the spatial relationships between the deceased, researchers identified nine distinct phases of interment...

belonged to Sekhentio-Ptah, a figure of significant administrative importance who lived between 2649 and 2150 B.C., a period defined by the rapid expansion of the Egyptian state and the construction of its most iconic pyramids. Inscriptions within the...

predators. The discovery is centered on the Duwi Formation, a geological layer dating back to the Late Cretaceous period that spans vast sections of Egypt. Researchers have long identified this area as a potential window into the past, as the rock...

immediately above and below the footprint horizon, the team successfully placed the visit during the last interglacial period, an era when the Arabian interior was significantly wetter than its current arid state. A Lush Landscape Transformed The Nefud...

the coins were carefully stored within this straw-lined pot before being hidden. The collection spans a significant period of Roman history. While the oldest piece dates back to 148 B.C.E., the bulk of the currency was minted between 69 and 96 C.E. The...

jellyfish and corals. First emerging approximately 540 million years ago, the group persisted until the end of the Triassic period roughly 200 million years ago. Because their physical structures were fragile and prone to rapid decomposition, intact...

Learn how gestational weeks and due dates are measured from the first day of your last period. Pregnancy dating provides the foundation for monitoring fetal development, planning prenatal care, and estimating the expected date of delivery (EDD)....

digital scans of more than 100,000 POSS-I photographic plates, covering nights between November 1949 and April 1957. This period is significant because it predates the launch of the first artificial satellite and coincides with the era of atmospheric...

wobble hinting at an unseen massive object. Yet the pair continues to intrigue astronomers because the orbital period of the red dwarf (14.9 days) and its rotation period (exceeding 100 days) are markedly out of sync, contrary to the tidal locking...

and funerary objects that illuminate the site’s long‑term role as a sophisticated burial hub, evolving from the Late Period into the Roman era. Hybrid Iconography Highlights Greek‑Egyptian Syncretism Archaeologists recovered roughly twenty limestone...

sought a more definitive chemical signature—one less likely to be a geological coincidence. The Cryogenian and Ediacaran periods were defined by severe glaciations, shifts in the global carbon cycle, and the oxygenation of the deep oceans, all of which...

organ once sat. The Egyptian Ministry of Tourism and Antiquities confirmed that the interments date to the Ptolemaic period, spanning from 304 to 30 B.C. While gold tongues have been identified in previous excavations, the concentration found at this...

in the country. This discovery provides the first concrete evidence that large dinosaurs roamed Japan during the Jurassic period. While the Japanese archipelago is rich in dinosaur fossils, the vast majority are associated with the later Cretaceous...

in PloS one, evaluated two common citrus rootstocks known as Troyer citrange and Cleopatra mandarin. Over a multi-year period, the researchers inoculated these rootstocks with fungal strains like Glomus intraradices, either alone or combined with...

perfection of the individual. But Neo-Lamarckism omitted the very idea. The Neo-Lamarckians argued that a considerable period of time was required for getting the effect of external factors. They also pointed out that if the external factors failed to...

attended D.A.V. High School in Multan (now West Punjab); Ratan Lal, one of his teachers, influenced him greatly during that period. Later, he studied at the Punjab University in Lahore where he obtained an M. Sc. degree. Mahan Singh, a great teacher and...

features Typical anaphylactic reactions typically manifest within minutes of allergen exposure and tend to subside within a period ranging from half an hour to one hour. However, these immediate reactions may be succeeded by inflammatory sequelae...