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American Focus > Blog > Tech and Science > Violent Supernovae Could Have Triggered at Least 2 Extinction Events : ScienceAlert
Tech and Science

Violent Supernovae Could Have Triggered at Least 2 Extinction Events : ScienceAlert

Last updated: March 13, 2025 1:27 am
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Violent Supernovae Could Have Triggered at Least 2 Extinction Events : ScienceAlert
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Supernova Explosions Linked to Mass Extinction Events on Earth

New research suggests that exploding stars in near-solar space may have triggered at least two mass extinction events in Earth’s history. An analysis led by astrophysicist Alexis Quintana of the University of Alicante in Spain reveals a correlation between the frequency of supernova explosions in the Milky Way and the Late Ordovician and Late Devonian extinctions, two devastating events that saw widespread loss of life.

Supernova explosions are among the most energetic events in the Universe. According to astrophysicist Nick Wright of Keele University in the UK, if a massive star were to explode as a supernova close to Earth, the consequences would be catastrophic for life on our planet. The research indicates that such events may have already occurred in the past, potentially leading to mass extinctions.

Supernovae are a natural part of the life cycle of stars more than eight times the mass of the Sun. When these massive stars run out of fuel, they become unstable and eventually explode, releasing a burst of energy and light into space.

If a supernova were to occur close enough to Earth, it could have devastating effects, including depleting the ozone layer and exposing the planet to harmful levels of ultraviolet radiation. The Late Ordovician and Late Devonian extinctions, which occurred around 445 million and 372 million years ago, respectively, were both associated with significant ozone layer depletion.

A Strange Signal Beamed at Earth From a Dead Star Can Finally Be Explained
The Crab Nebula supernova remnant, as imaged by JWST. (NASA, ESA, CSA, STScI, T. Temim/Princeton University)

Quintana and colleagues conducted a census of massive OB-type stars within a kiloparsec radius of the Sun to determine the rate of supernova explosions. They found a rate of 15 to 30 supernovae per million years across the Milky Way galaxy, with a rate of 2.5 near-Earth OB supernovae per billion years within a 20-parsec radius.

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While there are currently no stars nearby that are likely to explode in the near future, the study highlights the potential impact of supernova explosions on Earth’s ecosystems. Other catastrophic events, such as asteroid impacts or volcanic eruptions, also pose existential threats to life on our planet.

The research, set to be published in the Monthly Notices of the Royal Astronomical Society, sheds light on the possible role of supernovae in shaping Earth’s history and evolution. The study is available on the preprint server arXiv for further exploration.

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Trying something new can be a great way to break out of your comfort zone and experience life in a whole new way. Whether it’s trying a new hobby, taking a class, or even traveling to a new destination, there are endless possibilities for you to explore.

One of the best things about trying something new is the sense of excitement and adventure that comes with it. Stepping out of your comfort zone can be a little scary at first, but the thrill of trying something new and the sense of accomplishment that comes with it can be incredibly rewarding.

Not only does trying something new provide a mental boost, but it can also have physical benefits as well. Research has shown that trying new activities can help improve cognitive function, increase creativity, and even reduce stress levels. So why not give it a try and see how it can benefit you?

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If you’re not sure where to start, there are plenty of resources available to help you find something new to try. From online classes to local community events, there are endless opportunities for you to explore. And who knows, you may discover a new passion or interest that you never knew you had.

So what are you waiting for? Step out of your comfort zone, try something new, and see where it takes you. You never know, it could be the start of a whole new chapter in your life.

TAGGED:EventsextinctionScienceAlertSupernovaeTriggeredViolent
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