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This image shows the center of our Milky Way galaxy. It shows the position of stars in the so-called S star cluster, a small group of high-speed stars orbiting our Milky Way’s central black hole (at the black cross). Speedy star S4716 has set a new record as the fastest known of all these stars. Image via Peissker et al. Fast star orbiting the Milky Way’s black hole Scientists in Europe said on July 5, 2022 that they had found the fastest star known to orbit a black hole. And not just any black hole… it orbits Sagittarius A*, the giant black hole at the center of our Milky Way galaxy. Our central black hole weighs about 4 million times the mass of our sun. The newly discovered star is called S4716. It reaches an orbital speed of 5,000 miles per second (8,000 kps) around the black hole, or about 5,000 times faster than the fastest fighter jet. Imagine seeing star – a huge ball of turbulent gas that glows on its own – shooting at this speed! By the way, on the other hand, ou

An artist’s depiction of a bacterial cell. Credit: Centers for Disease Control and Prevention/James Archer Since its inception, chemotherapy has proven to be a valuable tool in treating many types of cancer, but it has significant drawbacks. Apart from killing cancer cells, it can also destroy healthy cells such as those in hair follicles, causing baldness, and those that line the stomach, resulting in nausea. Now, scientists at the California Institute of Technology (Caltech) may have a better solution: voice-controlled, genetically engineered bacteria that seek out and destroy cancer cells. In a new paper published in the journal “The goal of this technology is to take advantage of the ability of engineered probiotics to infiltrate tumors, while using ultrasound to activate them to release potent drugs inside the tumor,” professor Shapiro says. A strain of E. coli called Nissle 1917, which is approved for medical uses in humans, was the starting point for their work. After being

image: Sound reduces pain in mice by decreasing the activity of neurons in the brain’s auditory cortex (green and magenta) that project to the thalamus. see again Credit: Wenjie Zhou An international team of scientists have identified a neural mechanism through which sound dulls pain in mice. The findings, which could inform the development of safer methods for treating pain, are published in Science . The study was led by researchers at the National Institute of Dental and Craniofacial Research (NIDCR); China University of Science and Technology, Hefei; and Anhui Medical University, Hefei, China. NIDCR is part of the National Institutes of Health. “We needed more effective methods to manage acute and chronic pain, and that started with gaining a better understanding of the basic neural processes that regulate pain,” said NIDCR Director Rena D’Souza, DDS, Ph.D. “By uncovering the circuits that mediate the pain-reducing effec