Have you ever stopped to think that everything we can directly observe—stars, planets, galaxies, and the very matter that forms our bodies—represents only a small part of the Universe?

In this segment of Inteligência Ltda., physicist and cosmologist Marcelo Gleiser explains why about 5% of the Universe corresponds to ordinary matter, while the rest is associated with dark matter and dark energy, two of the greatest mysteries of modern cosmology.

Marcelo explains how scientists know that dark matter exists even without being able to observe it directly, using its gravitational effects on stars and galaxies. He also shows the difference between dark matter and dark energy and comments on how the discovery of the accelerated expansion of the Universe in 1998 changed our understanding of the evolution of the cosmos.

The segment also addresses the Big Bang, the current limits of science in explaining the initial moment of the Universe, cosmic expansion, and the possibility of the Universe continuing to expand indefinitely.

Among the main topics are: dark matter, dark energy, expansion of the Universe, Big Bang, cosmology, composition of the Universe, gravity, galaxies, and the limits of scientific knowledge.

🎙️ Excerpt taken from:
MARCELO GLEISER - Inteligência Ltda. Podcast 1559

▶️ Full episode:

https://www.youtube.com/live/Xy-xPAZ6...

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CHAPTERS:
00:00 Big Bang and the limits of science
05:27 How can the Universe expand?

08:22 Will the Universe expand forever?

09:48 What is dark matter?

13:45 Dark matter and dark energy
14:25 What is the Universe made of?

15:25 How dark energy was discovered
18:22 What we still don't know about the Universe

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