Earth facts

An artist’s impression of a planet with a magma ocean at its surface

Episode

381

The Birth of Earth

August 13, 2024

The Historic Entrance to Mammoth Cave

Episode

379

Mammoth Cave’s Rich History

July 30, 2024

Rust forms on an intricately decorated iron lock

Episode

376

Rust Results

July 9, 2024

View of Big Bend National Park at dusk

Episode

371

Rio Grande's Big Bend

June 4, 2024

picture of the Earth–Moon system

Episode

367

If Earth Had No Moon

May 7, 2024

Three of the many swimmers depicted in the Cave of the Swimmers

Episode

366

Swimming in the Sahara

April 30, 2024

A Pi Day pie

Episode

359

Pi (π) Is Everywhere

March 12, 2024

The geologic clock

Episode

348

Deep Time

December 26, 2023

A container holding dry ice.

Episode

344

Our Water Supply Is Blown Away

November 28, 2023

A deep-sea fish

Episode

338

So Many Fish in the Sea

October 17, 2023

Mount Everest 3D map

Episode

337

How Tall Can Earth’s Mountains Get?

October 10, 2023

Fossil

Episode

336

Evolution Hatches the Egg

October 3, 2023

How much does a cloud weigh?

Episode

332

Puffy Clouds Weigh In

September 5, 2023