Black holes, those gravitational monsters so named because no light can escape their clutches, are by far the most mysterious objects in the universe. But a new theory proposes that black holes may not be black at all. According to a new study, these black holes may instead be dark stars home to exotic physics at their core. This mysterious new physics may cause these dark stars to emit a strange type of radiation; that radiation could in turn explain all the mysterious dark matter in the universe, which tugs on everything but emits no light. Related: The 11 biggest unanswered questions about dark matter Dark stars Thanks to Einstein’s theory of general relativity , which describes how matter warps space-time, we know that some massive stars can collapse in on themselves to such a degree that they just keep collapsing, shrinking down into an infinitely tiny point — a singularity. Once the singularity forms, it surrounds itself with an event horizon. This is … [Read more...] about Black holes could be dark stars with ‘Planck hearts’
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Skeletons of WWII-era nuns murdered by Soviets unearthed in Poland
Archaeologists recently unearthed the skeletons of three Catholic nuns who were murdered by Soviet soldiers at the end of World War II . Their discovery concludes a months-long search for the bones of seven nuns who were killed during the former Soviet Union's brutal occupation of the war-torn country. Russia's Red Army invaded Poland in 1944, as Nazi Germany withdrew their soldiers. During that time, Soviet forces sought to seize control by suppressing Polish militia and religious figures, imprisoning, deporting and killing Polish soldiers, clergy and civilians. Records from 1945 documented Soviet soldiers slaughtering seven nuns in the order of St. Catherine of Alexandria, representatives of the Polish Institute of National Remembrance (IPN) told Live Science in an email. To find out where these murdered nuns were buried, archaeologists first excavated a site in Gdańsk in July 2020, where they found the remains of Sister Charytyna (Jadwiga Fahl), according to a statement … [Read more...] about Skeletons of WWII-era nuns murdered by Soviets unearthed in Poland
Virtual reality has found a new role: Teaching doctors to deal with patients
For medical students and junior doctors, training can be hit and miss. Sometimes you sit down with an actor who plays the part of a patient and rehearse giving a difficult diagnosis, sometimes there's a dummy that you examine, with a colleague shouting out imaginary symptoms along the lines of "His blood pressure's gone through the floor!" or "She looks sweaty and confused now!" In most cases, your imagination has to do the legwork, converting the unmoving peach-coloured rubber torso into a patient urgently in need of assistance or the actor into someone who's about to get bad news. If you're lucky, you get to practice this way a few times a year. If you're in a pandemic, you might not even get that. With training oftentimes taking place in hospitals, students and trainers now can't go to these facilities in order to reduce the risk of transmitting COVID. So now a number of universities and medical institutions are turning to virtual reality to bridge the training gap. … [Read more...] about Virtual reality has found a new role: Teaching doctors to deal with patients