Nobel Laureate Adam Riess: Tension In The Cosmos! (#329)

Watch the full video on youtube here: https://youtu.be/b3Tx1g8gKmY
Other Episode with Adam Riess: https://youtu.be/WZUqzHRuzhA Adam
Riess is a renowned astrophysicist recognized for his
groundbreaking research on the expansion of the universe with the
2011 Nobel Prize in physics Through extensive measurements and
collaborations with other scientists, Riess discovered an
intriguing tension in the size of the universe's expansion, which
has steadily grown over the past decade. These results, reaching a
significant level of more than 5 sigma, revealed an unexpected
phenomenon: the rate of the universe's expansion seems to differ
based on whether one starts from the beginning shortly after the
big bang or from the present. This unexpected autonomy in the
expansion challenged the traditional cosmological model, which
tells the story of the universe's evolution from its inception to
its current state. Riess's research has generated suspicion among
many scientists, leading them to question whether the cosmological
model itself needs revision. In his pursuit of unraveling the
mysteries of the universe, Riess reminds us that advanced
technology may often be mistaken for something magical. On this
episode of INTO THE IMPOSSIBLE Riess explores the challenges of
measuring distances in the universe and the discrepancies between
measurements of the expansion rate of the universe first observed
by Edwin Hubble namesake of The Hubble Constant, a pillar of
cosmology. From the use of parallax (dating back to ancient Greece)
to the use of Cepheid variables and Type 1a supernovae, Riess takes
listeners on a journey through the cosmic distance ladder and the
problem of the variation in the measurement of the Hubble constant
known as the Hubble Tension. The possible role of dark energy is
discussed, opening up new avenues for scientific investigation.
Riess shares insights into the concept of the cosmological
principle, and how it is challenged by the Hubble Tension. The
conversation touches on peak experiences, the awe-inspiring
encounters with nature that trigger moments of gratitude and
curiosity, and the importance of sustaining these feelings in
scientific exploration. Riess highlights the empirical nature of
observational cosmology and the need for continued data collection
and refining of models. Black holes, gravitational lensing, and
Adam’s motivations to pursue precision science are discussed.
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