The Dinosaur Extinction Mystery Revisited: New Theories & Surprising Discoveries | #378
Space Nuts November 16, 2023
00:50:0245.86 MB

The Dinosaur Extinction Mystery Revisited: New Theories & Surprising Discoveries | #378

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In this episode,hosts Andrew Dunkley and Professor Fred Watson delve into the cataclysmic demise of the dinosaurs, exploring various extinction theories with a fervent quest for truth, unraveling the enigmatic ancient puzzle while seeking to unearth the ultimate cause. In this episode, you will be able to:
Explore the fascinating theories behind the extinction of dinosaurs and gain a deeper understanding of this monumental event in Earth's history.
Discover the impact that star growth has on planets orbiting around them, unraveling the intriguing dynamics of celestial bodies.
Delve into the mysteries of the Andromeda galaxy, known for its massive black holes, and uncover the secrets hidden within its immense expanse.
Learn how gravity and Hawking radiation intertwine, shedding light on the intricate relationship between these fundamental forces of the universe.
Immerse yourself in the captivating discussions from the Space Nuts podcast, where space enthusiasts and science lovers engage in thought-provoking conversations about our vast cosmos.
Gain a deeper understanding of the theories surrounding the extinction of dinosaurs and uncover the mysteries behind their disappearance.
Explore the fascinating impact of star growth on orbiting planets, and how it influences the conditions necessary for life to exist.
Discover the captivating secrets of the Andromeda galaxy and its enigmatic black holes, expanding your knowledge of the vastness of the universe.
Unravel the intricate interplay between gravity and Hawking radiation, and its implications for our understanding of the fundamental laws of physics.
Delve into the Space Nuts podcast discussions and indulge your curiosity in a wide array of captivating space-related topics, offering a unique opportunity to expand your knowledge and engage with fellow space enthusiasts. It's extraordinary that 40 years after it was suggested, we're still finding out about this impact and seeing different aspects to it because of the devastation that it caused. - Andrew Dunkley
The extinction of dinosaurs has been a topic of intrigue for centuries. Various theories propose the cause to be major environmental changes, catastrophic asteroid impact, or major shifts in vegetation, leading to dental maladies among the dinosaurs. The most recent development in this field proposes a global winter induced by the fallout of an asteroid impact, a theory which aligns with the devastation level required to cause such a mass extinction. The resources mentioned in this episode are:
Visit website to read more about the new theory on what caused the extinction of the dinosaurs.
Check out the paper titled Chicxulub Impact Winter, sustained by fine silicate dust in the journal Nature Geoscience for more details on the research.
Explore the concept of the Anthropocene period and human-induced climate change by searching for articles and studies on the topic.
Learn more about the sun and its evolution by researching yellow dwarf stars and stellar evolution.
Discover more about the star Ro Corona Borealis and its similarities and differences to our own sun by searching for information on the star and its characteristics.
Read the paper by Stephen Kane in the Astrophysical Journal to delve deeper into the research on planets orbiting sunlike stars.
In this episode of the Space Nuts podcast, you'll join host Andrew Dunkley as he delves into the fascinating world of space exploration and scientific discoveries. With his friendly and approachable style, Andrew takes you on a journey through various topics, from the theories surrounding the extinction of dinosaurs to the lifecycle of stars and the interplay between galaxies and black holes. He effortlessly combines scientific knowledge with humor and curiosity, making complex concepts accessible to all. Whether you're a space enthusiast or simply curious about the mysteries of the universe, this episode of Space Nuts is sure to captivate your imagination and leave you with a deeper understanding of our cosmic surroundings. So sit back, relax, and get ready to embark on an interstellar adventure with Andrew Dunkley and his guests on Space Nuts. Timestamped summary of this episode:
00:00:00 - Introduction
Andrew Dunkley introduces the episode and previews the topics to be discussed, including the extinction of the dinosaurs, planets orbiting a star similar to ours, and audience questions about Andromeda gravity.
00:05:38 - New Theory on Dinosaur Extinction
Astronomers in Belgium and the UK have proposed a new theory on the extinction of the dinosaurs. They have found evidence of fine silicate dust in the rock strata, suggesting that the impact of a massive asteroid led to a global winter, which caused the mass extinction event.
00:08:41 - Impact of Silicate Dust
The distribution of silicate dust from the asteroid impact was larger than previously estimated. This fine dust, about 1 micron in diameter, could have stayed in the atmosphere for an extended period, contributing to the global winter and the extinction of the dinosaurs.
00:02:16 - Fred's Travels
Fred Watson discusses his upcoming travels to Sea Lake in Victoria for an astronomy weekend and his trip to New Zealand for the hundredth anniversary of an astronomical society. He also mentions his participation in a meeting about dark and quiet skies and the impact of satellites on astronomers.
00:04:44 - Interesting Statistics
Andrew Dunkley shares interesting statistics, including the percentage of New Zealanders living in Australia (10% of their population) and the fastest-growing nationality moving to Australia (the Nepalese). He humorously advises Fred not to mix up Switzerland with Sweden, referencing a recent
00:17:05 - "Introduction to the Star's Lifecycle"
The star in question is a yellow dwarf in its midlife phase, approximately 4.57 billion years old. It is currently in a steady hydrogen burning phase, similar to the Sun. This phase will continue for another 4 billion years before it transitions into a giant star.
00:19:32 - "Planets Orbiting the Star"
The star, Ro Corona Borealis, has four known planets orbiting it. These planets are closer to the star than Mercury is to the Sun. One of the planets, Ro Corona Borealis d, is potentially in the habitable zone and could support life.
00:21:35 - "Impact of Star Growth on Planets"
As the star grows into a red giant, the planets' fate is uncertain. Some may evaporate or be torn apart by the gravitational effects. Others may be thrown out of the system and become rogue planets. The exact outcomes depend on the planets' orbits and interactions with other planets.
00:25:04 - "Predictions for the Planets"
The prediction for the four known planets is that one will evaporate within the star's atmosphere, one will spiral in and be tidally disrupted, one will be destroyed at the end of a phase of evolution, and the fate of the fourth planet is uncertain. There could also be other undetected planets that may survive or be influenced by the star's growth.
00:35:32 - The Spectacular Event of the Andromeda Galaxy
The speaker discusses the possibility of the Andromeda galaxy getting closer to our galaxy. Although the event would be spectacular, it would happen on a timescale that wouldn't affect us humans.
00:36:27 - Collision of Galaxies
The collision between our galaxy and the Andromeda galaxy would result in a phenomenal sight, but it would be a slow process that wouldn't impact us directly. Simulations indicate that the two galaxies will pass through each other multiple times before settling into a new galaxy devoid of hydrogen.
00:37:33 - Black Hole Merger
In response to a listener's question, it is mentioned that the black holes in the Milky Way and Andromeda galaxies would eventually merge due to their relative gravitational forces. This merging process is expected to happen during the collision of the two galaxies.
00:38:59 - Can Gravity Escape a Black Hole?
The question of whether gravity can escape a black hole is explored. Gravity is a force field associated with a theoretical particle called a graviton, but it has never been observed or confirmed. The escape of gravitons from a black hole remains uncertain.
00:41:23 - The Myth of Bagpipes on the Moon
The story of a mechanic named William Rudd playing bagpipes at the Tidbin Biller station during the Apollo program is shared. While it is unclear if the sound of the bagpipes was actually heard on the moon,

The extinction of dinosaurs has been a topic of intrigue for centuries. Various theories propose the cause to be major environmental changes, catastrophic asteroid impact, or major shifts in vegetation, leading to dental maladies am

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