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Please add discussion topics by making links on this page.

Make a new page for each discussion topic by typing the topic name on this page in double brackets — e.g. ((Jason needs a hair cut)). See the "Help" link in the sidebar of this page for more help.

If you put your name after your comments, you’ll get participation marks (up until the end of the lecture period).

You can see previous years' discussions at and and Have a look at those pages to get ideas for interesting topics. Or go back to the main page at Philosophy of the Cosmos.

You can see whether there are recent posts by looking at the Site History.

list new topics here:
Machine suffering : Quantum AI and affective computing
The little blue wren
Aliens - Shall We Say Hallo
What would happen if you jumped into a black hole?
Gravitational waves & extra dimensions?
Just because we can, does it mean we should?
CMB Cold Spot: supervoid or collision in a multiverse?
Defining alien 'life'
TRAPPIST-1 has three planets in the Goldilocks zone
General relativity predicts a smiley occurrence
Re Lectures 2 and 3
An Edgeless Universe?
Journalism Warning
Third-Dimensional Boundaries
A Common Solar System
The complexity of theories
The universe: A human study?
A Self-Indulgent Look at LIGO
Search for planet 9?
The 'Site History' button
Please explain?!
Cosmology jokes
Beauty and the beast
Move the money
The Race For Artificial Intelligence
Boltzmann Brains
Video on an analogy of the wave guide theory of quantum mechanics
F. Scott Fitzgerald on Intelligence
Making sense of string theory
Mach's Principle - Feeling Dizzy?
Fate of the Universe
Matter, antimatter

Breaking of symmetry

Defining a single dimension

Acceleration and dark energy

Space time and black holes

An accelerating universe

Dark energy

Principles for the universe