Here are several instances where Lex Fridman discusses various concepts of "backup" in different contexts:

1. Creating a Backup Copy for Humanity: Lex Fridman and Rob Reid discuss the idea of taking human consciousness seriously and colonizing other planets as a solution to protecting human civilization from self-destruction 1.

2. Backup Plan for Humanity: In a conversation with Paul Rosolie, Lex explores the need for a backup plan to preserve human life in case Earth's conditions become unlivable due to catastrophic events like nuclear war 2.

3. Saving Human Knowledge: Lex emphasizes the importance of preserving human knowledge in a way that transcends our potential self-destruction, potentially by storing it in space and signaling its existence to future civilizations or super-intelligent AIs 3.

   

   1

   Backup for Humanity

   01:19:14

   

   2

   Backup Plan

   02:38:39

   

   3

   Saving Human Knowledge

   00:00:00

   

   4

   Aging Backup

   00:27:48

   

   5

   Cosmic Cultural Transmission

   01:21:49

   

   6

   Future of Humanity

   03:04:54

4. Aging Backup: With David Sinclair, they discuss the concept of a backup copy within the body to reset the epigenome and slow down aging, drawing an analogy to restoring a scratched DVD to its original state 4.

5. Interstellar Backup: Continuing the discussion about human backups, Rob Reid elaborates on the concept of creating multiple backups of human civilization across the solar system and eventually considering interstellar transmissions 5.

6. Future Human Experience: Lex and Andrej Karpathy touch on the idea of humans becoming a multi-planetary species and having a backup on Mars to secure the future of humanity 6.

These conversations highlight Lex's interest in ensuring the long-term survival and preservation of humanity and human knowledge through various forms of backups.