2.1 New World

2.2 Malthus Was Wrong

2.3 Strange Rockets

2.4 How to Die in Outer Space

2.5 How to Build an Ocean

BONUS: What's coming up

In Conversation #1 – What if there’s life on Mars?

In Conversation #2 - Dyson swarms and death rays

In Conversation #3 - Genetically modified everything

In Conversation #4 - Superbrains and simulated worlds