Twin jets erupt from a supermassive black hole in Draco, offering new insights into black hole activity and evolution.
Category: evolution – Page 2
(Q&A — 46:21) Madeline Lancaster, PhD presents her paper as published in the July 10, 2020 issue of Science. [Show ID: 36720]
Please Note: Knowledge about health and medicine is constantly evolving. This information may become out of date.
More from: Breaking News in Stem Cells: Southern California Stem Cell Seminar Series.
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For example, to compute the magnetic susceptibility, we simply select the operator \(A=\beta {({S}^{z})}^{2}\), where β = 1/T is the inverse temperature. Interestingly, this method of estimating thermal expectation values is insensitive to uniform spectral broadening of each peak, due to a cancellation between the numerator and denominator (see discussion resulting in equation (S69) in Supplementary Information). However, it is highly sensitive to noise at low ω, which is exponentially amplified by e−βω. To address this, we estimate the SNR for each DA(ω) independently and zero-out all points with SNR below three times the average SNR. This potentially introduces some bias by eliminating peaks with low signal but ensures that the effects of shot noise are well controlled.
To quantify the effect of noise on the engineered time dynamics, we simulate a microscopic error model by applying a local depolarizing channel with an error probability p at each gate. This results in a decay of the obtained signals for the correlator \({D}_{R}^{A}(t)\). The rate of the exponential decay grows roughly linearly with the weight of the measured operators (Extended Data Fig. 2). This scaling with operator weight can be captured by instead applying a single depolarizing channel at the end of the time evolution, with a per-site error probability of γt with an effective noise rate γ. This effective γ also scales roughly linear as a function of the single-qubit error rate per gate p (Extended Data Fig. 2).
Quantum simulations are constrained by the required number of samples and the simulation time needed to reach a certain target accuracy. These factors are crucial for determining the size of Hamiltonians that can be accessed for particular quantum hardware.
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Through his research, the physician believes there are clues hinting at our reality being a simulation, an has even suggested that mutations are not random — which would debunk the theory of evolution.
The abstract of Vopson’s study read: The simulation hypothesis is a philosophical theory, in which the entire universe and our objective reality are just simulated constructs.
Despite the lack of evidence, this idea is gaining traction in scientific circles as well as in the entertainment industry.
Southwest Research Institute partnered with the Carnegie Institution for Science to perform laboratory experiments to better understand how Saturn’s moon Titan can maintain its unique nitrogen-rich atmosphere. Titan is the second largest moon in our solar system and the only one that has a significant atmosphere.
“While just 40% the diameter of the Earth, Titan has an atmosphere 1.5 times as dense as the Earth’s, even with a lower gravity,” said SwRI’s Dr. Kelly Miller, lead author of a paper about these findings published in the journal Geochimica et Cosmochimica Acta. “Walking on the surface of Titan would feel a bit like scuba diving.”
The origin, age, and evolution of this atmosphere, which is roughly 95% nitrogen and 5% methane, has puzzled scientists since it was discovered in 1944.
Genetic engineering is a beacon of hope. It promises eternal life, curing diseases and feeding the growing world population. The possibilities are boundless. The invention is not that old. But their pace is rapid. Life without genetic engineering will no longer exist. We are at the beginning of a new evolution.
The Silent Front (Extra Long Documentary) — • The Silent Front: Spies and Secrets o…
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Researchers led by electrical engineers at the University of California San Diego have developed a better way to perform the comparative analysis of entire genomes. This approach can be used to study relationships between different species across geological time scales.
This new approach is poised to unlock discoveries regarding how evolution has shaped present-day genomes and also how the tree of life is organized. The new method, named CASTER, is described in a paper published in Science on 23 January 2025.
CASTER is poised to offer biologists a far more scalable approach than state-of-the-art for comparing full genomes. This is especially relevant given the exploding number of sequenced genomes of both living and also extinct species.
“Part of the atmosphere of this planet is moving towards us at a high velocity while another part is moving away from us at the same speed,” said Dr. Lisa Nortmann.
Do weather patterns on exoplanets mimic those on Earth? This is what a recent study published in Astronomy & Astrophysics hopes to address as an international team of researchers explored unique weather patterns on WASP-127b, which is a hot Jupiter exoplanet located approximately 520 light-years from Earth. This study has the potential to help scientists better understand the formation and evolution of weather patterns on exoplanets throughout the cosmos and how these patterns compare to Earth’s.
For the study, the researchers used the CRyogenic high-resolution InfraRed Echelle Spectrograph (CRIRES+) instrument installed on the European Southern Observatory’s (ESO) Very Large Telescope (VLT) to observe the atmospheric characteristics during one transit of WASP-127b passing in front of its parent star, with one orbit being completed in approximately 4.2 days.
In the end, the researchers identified signals of water (H2O) and carbon monoxide (CO) within WASP-127b’s atmosphere, along with identifying supersonic jet winds occurring at the exoplanet’s equator estimated to be traveling at approximately 7.7 kilometers per second (4.8 miles per second) or 27,720 kilometers per hour (17,280 miles per hour). These winds were identified to only exist at the equator and not at the poles. For context, the fastest winds recorded at the Earth’s equator is only a few kilometers (miles) per hour. They also found significant temperatures differences between the dayside and night side of WASP-127b, which mimics planetary atmosphere behavior of Earth and other planets in our solar system.
Researchers predict that having extra sets of chromosomes can both speed up and slow down the evolution of an organism, depending on the organism’s “fitness landscape.”
New research using climate models provides fascinating insights into how environmental conditions influenced the evolution and migration of early humans.
One study uses deep-sea sediment cores to trace the climatic factors that enabled or hindered hominin settlement in Europe, while another study explores the interbreeding opportunities between Neanderthals and Denisovans due to shifting climates. These findings not only enhance our understanding of human history but also underscore the impact of long-term climatic changes on human habitats and interactions.
Climate Modeling and Hominin Evolution.