Classy.←Back to all courses
Carl Sagan
Science & Wonder

Carl Sagan

Teaches Cosmic Wonder

Carl Sagan was an astronomer, cosmologist, and science communicator who made the wonders of the universe accessible to millions. His TV series Cosmos remains one of the most watched science programs in history.

4 lessons4+ hours of contentAll free on YouTube

Start Here

Pale Blue Dot
6 min

Pale Blue Dot

Cosmos
A Universe Not Made for Us
10 min

A Universe Not Made for Us

Cosmos

Deep Dives

Cosmos: A Personal Voyage - Episode 1
1h

Cosmos: A Personal Voyage - Episode 1

Cosmos
The Demon-Haunted World
45 min

The Demon-Haunted World

Interview

Key Concepts

The Pale Blue Dot
Earth is a tiny speck—cherish and protect it.
Cosmic Perspective
Understanding our place in the vast universe.
Scientific Skepticism
Question everything, but with rigor and humility.
Wonder
Science enhances rather than diminishes the beauty of nature.