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An Exploding Star 65 Light-Years Away From Earth May Have Triggered a Mass Extinction


3 APRIL 2021
Life was trying, but it wasn t working out. As the Late Devonian period dragged on, more and more living things died out, culminating in one of the greatest mass extinction events our planet has ever witnessed, approximately 359 million years ago.
 
The culprit responsible for so much death may not have been local, scientists say. In fact, it might not have even come from our Solar System.
Rather, a study published in August last year, led by astrophysicist Brian Fields from the University of Illinois Urbana-Champaign, suggests this great extinguisher of life on Earth could have been a distant and completely foreign phenomenon – a dying star, exploding far across the galaxy, many light-years away from our own remote planet. ....

Zhenghai Liu , University Of Illinois Urbana Champaign , Plate Devonian , Brian Fields , Illinois Urbana Champaign , Amp Quot , பல்கலைக்கழகம் ஆஃப் இல்லினாய்ஸ் ஊர்பன சாம்பியன் , தாமதமாக டெவோனியன் , பிரையன் புலங்கள் , இல்லினாய்ஸ் ஊர்பன சாம்பியன் ,

Massive Lungfish Genome Sheds Light On How Fish Managed To "Conquer" Land


Once upon a time, a fish decided enough was enough and dragged itself on land to see what was happening up top. The move took place back in the Devonian about 430 million years ago and was executed by one of the lobe-fined fishes known to science as Sarcopterygii. It would become a defining moment in Earth’s history, as these fish began to adapt to life on land and eventually became tetrapods, four-footed animals that encompasses all vertebrates higher than fishes.
But the story doesn’t begin with the first fish to conquer land, as a series of pivotal innovations associated with terrestrialization had to unfold before they were ready to march their scales up-bank. A new study published in the journal Nature has taken a dive into these genetic adaptations by sequencing the entire genome of the Australian lungfish ( ....

Siegfried Schloissnig , Research Institute Of Molecular Pathology , Research Institute , Molecular Pathology , ஆராய்ச்சி நிறுவனம் ஆஃப் மூலக்கூறு நோயியல் , ஆராய்ச்சி நிறுவனம் , மூலக்கூறு நோயியல் ,