Series · 4 episodes · 3:24
Big ideas in science
Evolution, immunity, relativity and black holes: four ideas that changed how we see life and the universe.
Play from episode 1- 1
2:00How natural selection works
Natural selection in four steps: variation is inherited, more are born than survive, the fittest pass the filter, and deep time draws the tree of life.
- 2
0:28How vaccines train your immune system
A vaccine lets your immune system meet a harmless copy of a germ, learn its shape and remember it, so the real germ meets a fast response.
- 3
0:28Why moving clocks run slow
Special relativity in four steps: light’s fixed speed and a clock made of light show why a moving clock ticks more slowly.
- 4
0:28How a black hole forms
Why the heaviest stars collapse, what an event horizon is, and how small the Sun would have to be squeezed to become a black hole.