Episodes

  • Snowball Earth Evidence, Blue Origin's Parachute Mishap, and the Moon's Horizon Illusion: S28E23

    Snowball Earth Evidence, Blue Origin's Parachute Mishap, and the Moon's Horizon Illusion: S28E23
    Feb 21 2025
    SpaceTime Series 28 Episode 23
    The Astronomy, Space and Science News Podcast
    Snowball Earth Evidence, Blue Origin's Parachute Failure, and the Moon Illusion Explained
    In this episode of SpaceTime, we dive into groundbreaking geological research that provides compelling evidence for the Snowball Earth hypothesis, suggesting that glaciers may have covered the planet from pole to pole hundreds of millions of years ago. This research reveals insights into Earth's climatic history and the emergence of multicellular life following this extreme glaciation event.
    Blue Origin's Lunar Gravity Mission
    We also discuss the recent Blue Origin mission, where the New Shepard spacecraft experienced a parachute failure during a lunar gravity simulation flight. Despite the malfunction, mission managers confirm that the capsule was designed to land safely with two parachutes, and investigations are underway to understand the issue.
    The Moon Illusion: Why Does It Appear Larger on the Horizon?
    Additionally, we explore the fascinating phenomenon known as the Moon illusion, which causes the Moon to appear larger when it is near the horizon compared to when it is high in the sky. We delve into the psychological and perceptual factors that contribute to this optical illusion, despite the Moon's actual size remaining constant.
    00:00 Space Time Series 28 Episode 23 for broadcast on 21 February 2025
    00:49 Evidence supporting the Snowball Earth hypothesis
    06:30 Implications for Earth's climatic history
    12:15 Blue Origin's lunar gravity mission details
    18:00 Analysis of parachute failure during descent
    22:45 The Moon illusion and its psychological explanations
    27:00 Understanding optical illusions in astronomy
    30:15 The self-domestication of wolves and its implications
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    ✍️ Episode References
    NASA
    https://www.nasa.gov
    Proceedings of the National Academy of Sciences
    https://www.pnas.org
    New England Journal of Medicine
    https://www.nejm.org
    Royal Society B
    https://royalsocietypublishing.org/journal/rspb
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    21 mins
  • Van Allen's New Belts, Alien Oceans and Life, and Massive Black Hole Jets Uncovered: S28E22

    Van Allen's New Belts, Alien Oceans and Life, and Massive Black Hole Jets Uncovered: S28E22
    Feb 19 2025
    SpaceTime Series 28 Episode 22
    The Astronomy, Space and Science News Podcast
    New Van Allen Radiation Belts, Alien Oceans and Signs of Life, and the Largest Black Hole Radio Jet Ever Detected
    In this episode of SpaceTime, we uncover the discovery of two new temporary Van Allen radiation belts created by a massive solar storm that struck Earth in May 2024. This event not only produced stunning auroras but also highlighted the importance of understanding the dynamics of radiation belts for the safety of satellites and astronauts. The findings, reported by NASA's Colorado Inner Radiation Belt Experiment, reveal that these belts can last significantly longer than previously thought, with implications for future solar storms and spaceflight safety.
    Searching for Life in Alien Oceans
    We also explore the challenges of detecting signs of extraterrestrial life in the subsurface oceans of icy moons like Saturn's Enceladus. A new study suggests that the unique physics of these oceans could hinder the movement of biological signatures from deep waters to the surface, complicating the search for life beyond Earth. This research emphasizes the need to understand ocean dynamics in the search for life in our solar system.
    The Largest Black Hole Radio Jet in the Early Universe
    Additionally, astronomers have identified the largest radio jet ever seen in the early universe, spanning an astonishing 200,000 light years. This discovery sheds light on the formation of massive jets and quasars, providing crucial insights into the evolution of galaxies in the early cosmos. The quasar, which formed when the universe was just 9% of its current age, challenges previous assumptions about the conditions needed for such powerful jets to form.
    00:00 Space Time Series 28 Episode 22 for broadcast on 19 February 2025
    00:49 Discovery of new Van Allen radiation belts
    06:30 Implications of the May solar storm
    12:15 Challenges in detecting life in Enceladus's oceans
    18:00 The significance of ocean dynamics in extraterrestrial life searches
    22:45 The largest black hole radio jet ever observed
    27:00 Understanding quasars and their impact on galaxy evolution
    30:15 The implications of AI self-replication
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    ✍️ Episode References
    NASA
    https://www.nasa.gov
    Geophysical Research Space Physics
    https://agupubs.onlinelibrary.wiley.com/journal/19448007
    Communications and Earth Environment
    https://www.nature.com/ncomms/
    Astrophysical Journal Letters
    https://iopscience.iop.org/journal/2041-8205

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    23 mins
  • Earth's Inner Core Mysteries, China's Lunar Quest, and Hot Jupiter Insights: S28E21

    Earth's Inner Core Mysteries, China's Lunar Quest, and Hot Jupiter Insights: S28E21
    Feb 17 2025
    SpaceTime Series 28 Episode 21
    The Astronomy, Space and Science News Podcast
    Shifting Dynamics of Earth's Inner Core, China's Lunar South Pole Mission, and Insights into Hot Jupiter Exoplanets
    In this episode of SpaceTime, we explore groundbreaking research revealing that Earth's inner core may be less solid than previously believed. A new study indicates that the near surface of the inner core is undergoing structural transformations, influenced by interactions with the turbulent outer core. This discovery provides fresh insights into the dynamics of Earth's core and its impact on the planet's magnetic field and rotation.
    China's Chang'e 7 Mission: A Quest for Lunar Water Ice
    We also discuss China's upcoming Chang'e 7 mission, set to launch next year, which aims to search for water ice at the lunar south pole. This mission will employ advanced technologies to locate and analyze water ice deposits, crucial for supporting future manned missions to the Moon and beyond. The Chang'e 7 mission will include an orbiter, lander, rover, and a mobile hopper designed for traversing shadowed craters.
    Hot Jupiter Progenitor: New Discoveries in Exoplanet Research
    Additionally, we delve into the fascinating discovery of a hot Jupiter exoplanet with an eccentric orbit, shedding light on the formation processes of these gas giants. The research indicates that this planet has likely been influenced by a binary star system, providing new evidence for the mechanisms behind hot Jupiter migration and evolution.
    00:00 Space Time Series 28 Episode 21 for broadcast on 17 February 2025
    00:49 New findings on Earth's inner core
    06:30 Overview of China's Chang'e 7 mission
    12:15 Insights from the discovery of a hot Jupiter exoplanet
    18:00 Implications for planetary formation theories
    22:45 The significance of lunar water ice for future missions
    27:00 Understanding the dynamics of celestial bodies
    30:15 The impact of climate change on global temperatures
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    ✍️ Episode References
    NASA
    https://www.nasa.gov
    Nature Geoscience
    https://www.nature.com/ngeo/
    Journal of Nature Climate Change
    https://www.nature.com/nclimate/
    Macquarie University
    https://www.mq.edu.au

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    38 mins
  • Earth's Elemental Mysteries, Ariel's Geological Secrets, and Comet Atlas's Demise: S28E20

    Earth's Elemental Mysteries, Ariel's Geological Secrets, and Comet Atlas's Demise: S28E20
    Feb 14 2025
    SpaceTime Series 28 Episode 20
    The Astronomy, Space and Science News Podcast
    New Discoveries on Earth's Elements, Uranus's Moon Ariel, and the Fate of Comet Atlas
    In this episode of SpaceTime, we delve into a groundbreaking study that challenges long-held beliefs about the origins of Earth's missing moderately volatile elements, such as copper and zinc. This research suggests that rather than being lost during the early formation of the solar system, these essential elements were likely retained by the first planetesimals and lost later due to violent cosmic collisions during planetary growth, reshaping our understanding of planetary chemistry and habitability.
    Uranus's Moon Ariel: A Window to Its Interior
    We also explore the fascinating trench-like features on Uranus's moon Ariel, which may serve as conduits for internal materials. New research indicates that these medial grooves could provide insights into Ariel's geological history and potential subsurface oceans, highlighting the complex interplay of tectonic and volcanic activities on the moon's surface.
    Comet Atlas: A Dying Wonder
    Additionally, we discuss the fate of Comet G3 Atlas, which has recently passed perilously close to the Sun, resulting in the fragmentation of its nucleus. As it fades from view, Atlas becomes a headless wonder, leaving behind a trail of debris that will continue to orbit the Sun. This episode also features a look at the stunning night skies of February, including the iconic constellations and celestial events to observe.
    00:00 Space Time Series 28 Episode 20 for broadcast on 14 February 2025
    00:49 New insights into Earth's missing elements
    06:30 Trench-like features on Uranus's moon Ariel
    12:15 The demise of Comet G3 Atlas
    18:00 February night sky highlights
    22:45 The constellation Orion and its myths
    27:00 Exploring the Pleiades and other celestial wonders
    30:15 The significance of the Milky Way in stargazing
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    ✍️ Episode References
    NASA
    https://www.nasa.gov
    Science Advances
    https://www.science.org/journal/sciadv
    Planetary Science Journal
    https://www.journals.elsevier.com/planetary-science-journal
    Sky and Telescope
    https://skyandtelescope.org

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    40 mins
  • Earth's Water Origins, Bennu's Salty Secrets, and Marsquakes Unveiled: S28E19

    Earth's Water Origins, Bennu's Salty Secrets, and Marsquakes Unveiled: S28E19
    Feb 12 2025
    SpaceTime Series 28 Episode 19
    The Astronomy, Space and Science News Podcast
    New Insights into Earth's Water, Asteroid Bennu's Composition, and Marsquake Triggers
    In this episode of SpaceTime, we investigate a groundbreaking study that challenges previous beliefs about when water arrived on Earth. New findings suggest that water may have come in during the later stages of Earth’s formation, providing fresh perspectives on the origins of life on our planet. The study highlights the importance of molybdenum isotopes in understanding the timing of water delivery and the conditions necessary for life.
    Searles Lake and Asteroid Bennu
    We also explore the intriguing similarities between Searles Lake in California and the asteroid Bennu, as researchers find that both environments share common water-soluble minerals. The Osiris Rex mission has revealed that Bennu's samples contain evaporite minerals formed under wet conditions, shedding light on the potential for life-sustaining elements in our solar system's past.
    Meteoroid Impacts and Marsquakes
    Additionally, a new study indicates that meteoroid impacts may play a more significant role in triggering marsquakes than previously considered. Analyses from NASA's Mars InSight lander reveal that many seismic events on Mars could be linked to impacts, challenging existing assumptions about the planet's seismic activity.
    00:00 Space Time Series 28 Episode 19 for broadcast on 12 February 2025
    00:49 Water arrival on Earth
    06:30 Searles Lake and asteroid Bennu
    12:15 Meteoroid impacts and Marsquakes
    18:00 Changes in men's height and weight
    22:45 Discovery of ancient bird fossils in Antarctica
    27:00 The best way to boil an egg
    30:15 AI and national security concerns
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    ✍️ Episode References
    NASA
    https://www.nasa.gov
    Geochemistry and Cosmochemistry
    https://www.elsevier.com/journals/geochemistry-and-cosmochemistry
    Nature
    https://www.nature.com
    Geophysical Research Letters
    https://agupubs.onlinelibrary.wiley.com/journal/19448007
    Biology Letters
    https://royalsocietypublishing.org/journal/bl
    Nature Communications
    https://www.nature.com/ncomms/

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    33 mins
  • Asteroid Threats, Dark Matter Discoveries, and Martian Volcanism Unveiled: S28E18

    Asteroid Threats, Dark Matter Discoveries, and Martian Volcanism Unveiled: S28E18
    Feb 10 2025
    SpaceTime Series 28 Episode 18
    The Astronomy, Space and Science News Podcast
    Asteroid Threat Level Rusty, Dark Matter Experiment, and Martian Lava Rocks
    In this episode of SpaceTime, we discuss the alarming increase in the threat level of near-Earth asteroid 2024 YR4, now assessed at a 2.3% chance of impacting Earth on December 22, 2032. With astronomers worldwide closely monitoring its trajectory, we explore the potential consequences of an impact from this asteroid, including the possibility of a catastrophic airburst or a significant surface collision.
    New Dark Matter Experiment in Space
    We also delve into an ambitious new experiment aimed at uncovering the mysteries of dark matter. Researchers are testing a device that could potentially detect dark matter by measuring tiny signals in a zero-gravity environment. This groundbreaking approach seeks to provide insights into the elusive substance that constitutes approximately 85% of the universe's mass.
    Insights from Martian Lava Rocks
    Additionally, we examine findings from NASA's Mars Perseverance Rover, which are shedding light on a critical period in Martian history. The analysis of igneous rocks in Jezero Crater suggests that the Martian crust was formed through widespread volcanism, offering a glimpse into the planet's geological evolution and its implications for understanding the early solar system.
    00:00 Space Time Series 28 Episode 18 for broadcast on 10 February 2025
    00:49 Increased threat from asteroid 2024 YR4
    06:30 New dark matter detection experiment in space
    12:15 Martian lava rocks and the history of the Red Planet
    18:00 Microplastics accumulation in the human brain
    22:45 WHO review on radio wave exposure and cancer
    27:00 Genetically modified rice with reduced methane emissions
    30:15 Jane Goodall's belief in Sasquatch and its implications
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    ✍️ Episode References
    NASA
    https://www.nasa.gov
    Journal of Science Advances
    https://www.science.org/journal/sciadv
    Nature Medicine
    https://www.nature.com/nm/
    Molecular Plant
    https://www.cell.com/molecular-plant/home
    Australian Skeptics
    https://www.skeptics.com.au

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    20 mins
  • Io's Volcanic Powerhouse, Ceres' Organic Origins, and the Quest for Distant Exoplanets: S28E17

    Io's Volcanic Powerhouse, Ceres' Organic Origins, and the Quest for Distant Exoplanets: S28E17
    Feb 7 2025
    SpaceTime Series 28 Episode 17
    The Astronomy, Space and Science News Podcast
    Volcanic Activity on Io, Ceres and the Building Blocks of Life, and New Exoplanet Search Technology
    In this episode of SpaceTime, we explore the astonishing discovery of the largest volcanic hotspot ever observed on Jupiter's moon, Io. NASA's Juno mission reveals a feature that dwarfs Earth's Lake Superior and produces eruptions with six times the energy output of all the world's power plants. This unprecedented volcanic activity is driven by intense gravitational interactions with Jupiter, resulting in a dynamic landscape riddled with approximately 400 volcanoes.
    The Mystery of Ceres' Organic Compounds
    We also delve into new findings regarding the dwarf planet Ceres, where scientists have determined that organic deposits on its surface likely did not originate from its interior. Instead, these building blocks of life may have arrived through impacts from meteoroids, raising questions about the origins of life-sustaining compounds in our solar system.
    Advancements in Exoplanet Detection Technology
    Additionally, we discuss the latest advancements in technology designed to search for Earth-like exoplanets. The newly developed coronagraph for NASA's Nancy Grace Roman Space Telescope will significantly enhance our ability to directly image distant planets by blocking out starlight, paving the way for future missions aimed at identifying habitable worlds beyond our solar system.
    00:00 Space Time Series 28 Episode 17 for broadcast on 7 February 2025
    00:49 Discovery of a massive volcanic hotspot on Io
    06:30 Insights into organic compounds on Ceres
    12:15 New technology for exoplanet detection
    18:00 Omega-3 fatty acids and biological aging
    22:45 Infants' sense of smell development
    27:00 Tasmania's tallest trees documented
    30:15 Flat Earth theory and recent Antarctic explorations
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    ✍️ Episode References
    NASA
    https://www.nasa.gov
    Nature
    https://www.nature.com
    Journal of Geophysical Research
    https://agupubs.onlinelibrary.wiley.com/journal/21699356
    Journal of Astrobiology
    https://www.journals.elsevier.com/astrobiology
    Australian Journal of Biology

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    23 mins
  • Moon's Hidden Geology, Venus' DaVinci Mission, and Titan's Atmospheric Secrets: S28E16

    Moon's Hidden Geology, Venus' DaVinci Mission, and Titan's Atmospheric Secrets: S28E16
    Feb 5 2025
    SpaceTime Series 28 Episode 16
    The Astronomy, Space and Science News Podcast
    New Discoveries on the Moon, Venus Exploration, and Titan's Atmosphere
    In this episode of SpaceTime, we delve into a groundbreaking study revealing that the Moon may not be as geologically inactive as previously believed. Observations of small ridges on the lunar far side suggest recent tectonic activity, indicating that the Moon's geological history is more dynamic than once thought. Researchers found that these features, formed within the last 200 million years, could have significant implications for future lunar missions.
    NASA's Davinci Mission to Venus
    We also discuss NASA's upcoming Davinci mission, set to explore the mysteries of Venus. This innovative mission will deploy a descent probe into the planet's thick atmosphere, capturing high-resolution images and analyzing its unique geological features, including the ancient Tesserae that may provide insights into Venus's past.
    Understanding Titan's Atmosphere
    Additionally, we explore new research on Saturn's moon Titan, which maintains its dense nitrogen-rich atmosphere through chemical reactions occurring deep beneath its surface. The findings suggest that Titan's atmosphere, which features liquid methane rain and a complex organic chemistry, is replenished by internal processes that have puzzled scientists since its discovery.
    00:00 Space Time Series 28 Episode 16 for broadcast on 5 February 2025
    00:49 New findings on the geological activity of the Moon
    06:30 Overview of NASA's Davinci mission to Venus
    12:15 How Titan maintains its atmosphere
    18:00 Increase in temperature-related deaths in Europe
    22:45 Discovery of magma chambers in dormant volcanoes
    27:00 Creation of bipaternal mice using stem cell engineering
    30:15 Overview of Deepseek AI chatbot
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    ✍️ Episode References
    NASA
    https://www.nasa.gov
    Planetary Science Journal
    https://www.elsevier.com/journals/planetary-science-journal
    Geochemistry, Geophysics, Geosystems
    https://agupubs.onlinelibrary.wiley.com/journal/15252027
    Nature Medicine
    https://www.nature.com/nm/
    Nature Geoscience
    https://www.nature.com/ngeo/
    Cell Stem Cell
    https://www.cell.com/cell-stem-cell/home
    TechAdvice Life
    https://www.techadvice.life/

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    24 mins