John Lloyd: An inventory of the invisible

The video explores the concept of invisibility in various contexts, from matter and energy to human perception and scientific phenomena like gravity and consciousness. It includes a humorous story about Geoffrey Dickens to illustrate invisibility in social interactions. The discussion extends to the invisibility of genes, time, and human identity, as well as light and electricity. The video concludes with philosophical reflections on existence and purpose, highlighting the vast unknowns in our understanding.

How does the speaker use humor to convey complex ideas about invisibility and understanding?

Explain the significance of the human genome discussion in relation to what we cannot see.

What does the speaker mean by saying, 'We don't know one percent of one millionth about anything'?

What philosophical questions does the speaker pose at the end of the talk?