A gamma ray burst that occurred 7.5 billion years ago was visible on Earth by the naked eye this week. It was "2.5 million times brighter than the most powerful supernova ever seen."
Here's a History Channel video about Gamma ray bursts. "Scientists at the University of Kansas believe gamma ray bursts were responsible for a great mass extinction on Earth 450 million years ago. The gamma rays strip away the ozone layer and generates a chemical smog, producing a widespread chill that grips the globe. Every few seconds, a supernova emits jets of deadly gamma rays somewhere in the galaxy. If one of these gamma ray bursts should happen sufficiently close to the solar system, all life would perish."
Research has been conducted to investigate the consequences of Earth being hit by a beam of gamma rays from a nearby (about 500 light years) gamma ray burst. This is motivated by the efforts to explain mass extinctions on Earth and estimate the probability of extraterrestrial life. A gamma ray burst at 6000 light years would result in mass extinction; a 1000 light year distant burst would be equivalent to a 100,000 megaton nuclear explosion. A burst 100 light years away would blow away the atmosphere, create tidal waves, and start to melt the surface of the earth. There is a one in a million chance that there could be a gamma ray burst as near as the earth's closest star, Alpha Centauri, in the lifetime of the earth. Such a burst, at 4.3 lightyears distant, would effectively incinerate the earth.
Researchers successfully revived ancient microbes, some more than 100 million years old, that were buried in the seafloor. During an expedition to the South Pacific Gyre, the scientists from the Japan Agency for Marine-Earth Science and Technology (JAMSTEC) and their colleagues drilled into the ocean sediment almost 6,000 meters below the surface. “Our main question […]
My family stopped wiping down all our groceries to “disinfect” them a couple months ago, mostly because of hygiene exhaustion. Then in May, the Center for Disease Control and Prevention clarified its own Web page about how COVID-19 spreads to state that “based on data from lab studies on COVID-19 and what we know about […]
I’d totally go.
If you want to understand what it takes to keep a company’s computer network happy and healthy in the cloud, the training found in The Complete AWS eBook and Video Course Bundle can go a long way toward making sure you know the ins and outs of the AWS environment. This bundle brings together five […]
Part of the reason WordPress is the undisputed king of website creation is its open-source framework, allowing anyone to create plugins offering levels of functionality to WordPress sites that were unprecedented. So where do you find all the great ideas that are pushing WordPress forward? You can sample a heaping spoonful of that innovation with […]
If you’re a photographer, videographer, or graphic designer, you’ve got a lot of competition charging up behind you. Because while you’ve been trained as a content creator, the task of snapping brilliant images, capturing well-composed video, and posting effective social media is now part of literally everyone’s skill set. For years, Adobe and their ubiquitous […]