Physics and Astrophysics
Martin
Rees - Astrophysicist: Is this our Final Century?
Peter
Ward - On Earth's Mass Extinctions
David
Deutsch - Our Place in the Cosmos
Murray Gell-Mann - On Beauty and Truth in Fundamental Physics
Climate
Dave Roberts - Climate Change is Simple
Science and PseudoScience, Perception, Reality
James Randi: Homeopathy, Quackery, and Fraud
Michael Shermer - How Pseudoscience purveyors work
The Optimism Bias
Society
Jared Diamond - Why Societies Collapse
Ken Robinson - Schools Kill Creativity
Alex
Steffan - On a Sustainable Future
Ron Finley - Guerilla Gardening
On Teaching, Succeeding in Life
How Children Succeed (YouTube from Author Paul Tough)