26:17

Low-Tech Spacefaring Civilizations

27:49

Threats to Interplanetary & Interstellar Civilizations

33:06

Colônias espaciais exiladas

33:56

Megastructure Maintenance & Space Janitors

24:16

Space Derelicts & Trash Worlds

29:03

Things Which Will Never Exist

1:29

Some applications of IoT in building and running smart cities.

1:31:48

Impossible Technologies: The Clarketech Compendium