176 articles from THURSDAY 9.6.2022

The formation of gap solitons in a 1D dissipative topological lattice

Topological photonics is a rapidly evolving area of research that focuses on the design of photonic lattices where the behavior of light is inspired from the physics of topological insulators. While most studies in this area presented photonic systems with linear topological properties, recent works have started paving the foundations of non-linear topological photonics.

Digging is not just a game for children in hunter-gatherer groups

Ana Mateos and Jesús Rodríguez, scientists at the Centro Nacional de Investigación sobre la Evolución Humana (CENIEH), have published an experimental energy study in the journal Human Nature, using volunteers of both sexes aged 8 to 14, showing that digging is an activity requiring major physical effort at these ages, although it is not excessive. This effort of digging and extracting...

Development of a user-friendly, hot-melt, wound-healing adhesive

Scientist have developed a hot-melt tissue adhesive (i.e., medical glue that is applied in a molten state) capable of healing operative wounds. This adhesive has excellent medical material properties in terms of its ease of use, adhesiveness to tissues, biocompatibility and ability to prevent postoperative complications.

NASA to Discuss New Unidentified Aerial Phenomena Study Today

Portal origin URL: NASA to Discuss New Unidentified Aerial Phenomena Study TodayPortal origin nid: 480589Published: Thursday, June 9, 2022 - 10:12Featured (stick to top of list): noPortal text teaser: NASA will host a media teleconference at 1 p.m. EDT today – Thursday, June 9 – to discuss a new study team the agency is commissioning to examine unidentified aerial...

Comet Interceptor approved for construction

ESA's Comet Interceptor mission to visit a pristine comet or other interstellar object just starting its journey into the inner solar system has been "adopted" this week; the study phase is complete and, following selection of the spacecraft prime contractor, work will soon begin to build the mission.

What ancient toilets can teach us about Maya life, and tamales

Ancient toilets and trash pits are like heaven to archaeologists. They might not have the glamor of a gleaming medieval jewel or intricate Roman mosaic, but they brim with clues about the everyday life of bygone civilizations: the detritus—and discharges—of our ancestors telling rich stories of what the past was like for those without palaces or chests of gold. From the mundane and the messy,...

New map shows seabed of the Southern Ocean in unprecedented detail

The features of the ocean floor help determine how water masses and ocean currents move and how they affect our climate. Biodiversity is also influenced by seafloor landforms. Accordingly, having as precise information on the seafloor topography as possible is indispensable for oceanographic and climate research. With the second version of the International Bathymetric Chart of the Southern Ocean...

The physicochemical nature of colloidal motion waves among silver colloids

Traveling waves are commonly observed in biological and synthetic systems, and recent discoveries have shown how silver colloids form traveling motion waves in hydrogen peroxide under UV light. In a new report now published in Science Advances, Xi Chen and a team of researchers in smart materials, physics and optics at the Harbin Institute of Technology, and the Shanghai Jiao Tang University, in...

NASA has purchased five more Crew Dragon missions, keeping the ISS going until 2030

On November 15th, 2020, NASA and SpaceX made history when a crewed spacecraft—the Crew Dragon Resilience—lifted off from American soil and delivered four astronauts to the International Space Station (ISS). This mission (designated Crew-1) was a culminating achievement for NASA's Commercial Crew Program (CCP) and effectively restored domestic launch capability to the U.S. for the first time...

Extreme, severe drought impacting the upper Colorado River basin in the second century, new study finds

The Colorado River is in an extremely severe drought and has been for the last 22 years. To better understand this drought, researchers looked at the drought history within the Colorado River Basin. Previous studies have gone back 1,200 years, but this paper goes back 2,000 years. The findings, using paleo hydrology, show that there was an even more severe drought in the Colorado River Basin in...

Newly discovered molecular network regulates vitamin C biosynthesis in kiwifruit

Actinidia (kiwifruit) is rich in ascorbic acid (AsA) and Vitamin C (Vc) and is known as the "King of Vc," which makes it very popular with consumers. Interestingly, the fruit AsA content of different kiwifruit species varies up to 300- to 400-fold. However, the molecular regulation mechanisms of AsA synthesis in kiwifruit are still poorly understood.

Video: Charting sea level from space

Satellite images of our planet have become essential to our survival, offering a new outlook of our world. With rising seas being one of the biggest threats to society, satellite altimeter missions such as Copernicus Sentinel-6 are essential in monitoring global and regional changes in sea level.

Bones found on Isle of Wight may be from Europe’s biggest predator dinosaur

Remains suggest spinosaur, a crocodile-faced hunter, measured over 10 metres from snout to tailFossil hunters on the Isle of Wight have unearthed the remains of what may be the largest predatory dinosaur ever found in Europe.Pieces of bone belonging to a massive spinosaur, a two-legged crocodile-faced beast that lived 125m years ago, suggest the land-based hunter measured more than 10 metres from...

New species of alga named for poet Amanda Gorman

Researchers discovered a new species of alga in central New York and named it Gormaniella terricola, with the genus named after poet Amanda Gorman. The new species is quite interesting in that its chloroplast genome is highly repetitive and contains quite a bit of DNA from fungi and bacteria, meaning it was likely invaded multiple times from other species through a process called horizontal...