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Wednesday, July 6, 2022
A long-standing question in nuclear physics is whether chargeless nuclear systems can exist. Only neutron stars represent near-pure neutron systems, where neutrons are squeezed together by the gravitational force to very high densities. The experimental search for isolated multi-neutron systems has been an ongoing quest for several decades, with a particular focus on the four-neutron
Bacteria are considered microscopic isolated cells or colonies. They are single microscopic cells with DNA free-floating in their cytoplasm. The size of the bacterial cells varies in size from 2 micrometers to the highest 750 micrometers. In a recent study, researchers have discovered a bacterium that challenges the prevailing view of bacterial cell size. The
The composition of the bulk, the outer core of the Earth, is not pure iron but has a density deficit of about 5–10%, indicating the existence of a considerable amount of light elements in the outer core, possibly including hydrogen, carbon, nitrogen, oxygen, sulfur, and silicon. These are the observations of seismic wavespeed and density
Astronomers discovered a rocket body heading toward a lunar collision late last year. Impact occurred on March 4, with NASA’s Lunar Reconnaissance Orbiter later spotting the resulting crater. Surprisingly the crater is actually two craters, an eastern crater (18-meter diameter, about 19.5 yards) superimposed on a western crater (16-meter diameter, about 17.5 yards). The double
Whenever we listen to or think about biometrics, the first things that come to our mind are fingerprints or iris scans which are now common features in our phones. In this age of information and technology, biometric authentication is a critical way to safeguard valuable assets. From the usual suspects of fingerprints, palm prints, voices
Growing global food demand is currently facing a major constraint of efficient energy conversion using photosynthesis. Photosynthesis has evolved in plants for millions of years to turn water, carbon dioxide, and the energy from sunlight into plant biomass and the foods we eat. Most crop plants can convert sunlight and CO2 into plant biomass at
For the first time, NASA’s Hubble Space Telescope has offered compelling evidence for a lone black hole wandering through interstellar space after six years of meticulous observations. This black hole lies about 5,000 light-years away, in the Carina-Sagittarius spiral arm of our galaxy. This black hole has a mass of only 7.1 times that of
Accretion disks, also known as ‘protostellar disks,’ are key components in star formation. These disks continuously feed gas into protostars from the environment. In this sense, they are stellar cradles where stars are born and raised. Recently, a team of astronomers reported the discovery of a massive protostellar disk in the Milky Way’s center. The
Sunspots are dark, planet-sized regions that appear on the “surface” of the Sun. Space weather experts continuously keep an eye on sunspots. Recently, a giant sunspot was detected that doubled in size in the past 24 hours. As reported, this sunspot- AR3038 – is now facing Earth. It means it could send a solar flare
The electrical conductivity of semiconductors can be externally controlled via doping or electrical gating. This makes them vital elements for the diodes and transistors that underpin all modern electronic technology. For the first time, optics researchers at The University of Texas at Dallas have demonstrated that a new approach for producing ultrathin semiconductors produces material