Geetanjali is Associate Professor at St. Stephen’s College. She has a PhD in Cosmology from Delhi University. She's working on the Variable Chaplygin Gas model of dark energy.

Reach out to her on LinkedIn: https://www.linkedin.com/in/geetanjali-sethi-a7b201aa/?originalSubdomain=in

Find her research work on Google Scholar: https://scholar.google.com/citations?user=EK8KFB0AAAAJ

Back to the Stone Age is on:

- YouTube: https://youtube.com/playlist?list=PLZrhMJ5eusE_ACw6Ec3TqCbvDVZ6HP809&si=WhVnrLLAUuYW-Any

- Spotify: https://open.spotify.com/show/3pT8MUeR8bskcsuu8gmUGK

- Apple Podcast: https://podcasts.apple.com/us/podcast/back-to-the-stone-age/id1741219288

Outline

00:00 - Introduction

00:15 - Energy

02:53 - Dark matter and dark energy

10:15 - Dark energy as expansion of the universe

12:11 - Energy of empty space

17:08 - Heisenberg uncertainty principle

21:54 - Why dark energy has constant energy density

26:35 - Friedmann-Lemaitre-Robertson-Walker cosmological model

33:58 - Quintessence, modified gravity models

39:08 - Variable Chaplygin Gas model

39:40 - Cosmic fluid

43:34 - Differences with other models

48:19 - Fine-tuning in nature

53:31 - Combination of dark matter and dark energy

56:09 - Dependency of observations for the future of the universe

58:40 - Most interesting fact about the cosmos

59:24 - Making sense of enormous distances

01:05:42 - Will the universe expand forever?

01:11:38 - AI and science

01:13:01 - Limitations of human brain

01:17:45 - Conclusion

Conversations with Friends: Florens van der Moezel

https://www.linkedin.com/in/florens-van-der-moezel-a657a0276/

Find Back to the Stone Age on:

• YouTube: https://youtube.com/playlist?list=PLZrhMJ5eusE_ACw6Ec3TqCbvDVZ6HP809&si=WhVnrLLAUuYW-Any
• Spotify: https://open.spotify.com/show/3pT8MUeR8bskcsuu8gmUGK
• Apple Podcast: https://podcasts.apple.com/us/podcast/back-to-the-stone-age/id1741219288

Thanks to our sponsor Maryse Moerel (Florens' mother) for the chairs, table and car!

Outline:

00:00 - Introduction

01:10 - Alcohol

04:39 - Mental state under addiction

07:10 - Intoxicants, drugs and gambling

10:38 - Short-term rewards: smartphone, social media and dopamine

14:40 - Lack of commitment and shorter attention span

16:30 - Boredom

20:28 - Fleeing boredom

22:27 - Reasons for dopamine recalibration

25:53 - Alteration of the reward system

30:04 - Being present in the moment

35:35 - Why are people not interested in knowing

40:18 - Lack of passion and drive

45:03 - Consumeristic society and overwhelming information

50:39 - Is the Universe a One or a Many?

54:47 - Conversations with God

58:36 - What is God? Jesus, Muhammad, Siddhartha and godliness

01:06:40 - God, math and human language

01:08:19 - Godel Incompleteness Theorem and relation to irrational belief

01:13:05 - Higher forms of understanding

01:19:25 - Why are people not connected to their godliness

01:26:23 - Advice to listeners

01:29:25 - Conclusion

Nick Van Remortel is a professor of physics at the University of Antwerp, find him on Linkedin https://www.linkedin.com/in/nick-van-remortel-83a16373/

Outline:

00:00 - Introduction

00:36 - Cosmic microwave background radiation

25:10 - Size of the universe and infinity

30:20 - Expansion of the universe

40:45 - The standard model

01:02:30 - Greater purpose of fine-tuning and randomness

01:11:39 - Gravitational waves

01:18:10 - Principle of detection of gravitational waves

01:29:47 - Experimental effort of detection

01:32:29 - Information from gravitational waves

01:39:27 - Einstein Telescope

01:44:06 - Deep thoughts and conclusion