For most of human history, night meant darkness.

The sun disappeared.

The stars emerged.

The world became quieter.

But today, something strange is happening.

Across cities, suburbs, highways, airports, industrial areas, and even places far from civilization, artificial light is pushing darkness farther and farther away.

The night is disappearing.

In this episode, we explore the hidden consequences of light pollution and the growing transformation of our nighttime environment. We look at how streetlights, buildings, advertisements, vehicles, stadiums, security lighting, and expanding cities are changing what the Earth looks like after sunset.

We explore what happens when darkness becomes rare.

Astronomers struggle to see distant stars.

Migrating birds can become disoriented.

Insects ...