A waterworld with a boiling ocean and the end of dark matter? The week in science
Mar 14, 2024
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Challenging the existence of dark matter with a new physics theory, while exploring a planet with a boiling ocean. Also, discussions on the impact of microplastics on health and the interplay of politics, free speech, and science in the UK.
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Quick takeaways
A new theory challenges the existence of dark matter by proposing a classical view of space-time with fluctuating time rates.
Microplastics in artery plaque increase risks of strokes and heart attacks, urging reduced plastic exposure.
Deep dives
Controversial Theory Challenging Dark Matter
A new theory by Professor Jonathan Oppenheim from University College London challenges the need for Dark Matter in explaining the universe's phenomena, such as galaxy rotations. Oppenheim's theory unites quantum physics and gravitational theory, suggesting a classical view of space-time with fluctuating time rates. While unconventional, his theory offers an alternative explanation for galaxy rotations without the requirement of dark matter, enticing further scientific exploration and debates.
Microplastics' Impact on Cardiovascular Health
A study revealed the alarming presence of microplastics and nanoplastics in artery plaque, linking them to increased risks of strokes and heart attacks. The findings suggest that these tiny plastics trigger inflammation, potentially worsening arterial plaque buildup. With polyethylene and polyvinyl chloride particles ubiquitous in the environment and human ingestion, researchers stress the need to reduce exposure by avoiding plastic use in daily activities like microwaving meals in plastic containers.
James Webb Space Telescope's Discovery on Exoplanet TOI-270D
Recent observations by the James Webb Space Telescope suggest that exoplanet TOI-270D may be covered by a deep liquid water ocean, raising curiosity about potential life forms. Despite the exciting prospect of a water-covered planet, challenges like extreme temperature variations due to tidally locked rotation cast doubts on its habitability. The telescope's precise measurements offer valuable insights into exoplanet conditions and the search for extraterrestrial life.
Ian Sample and science correspondent Hannah Devlin discuss some of the science stories that have made headlines this week, from a new theory challenging the existence of dark matter to an alarming study about the possible impact of microplastics on our health and a glimpse of a ‘waterworld with a boiling ocean’ deep in space. Help support our independent journalism at theguardian.com/sciencepod
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