Earth facts

A depiction of how Earth might look if it had rings.

Episode

432

Did Earth Have Rings

August 5, 2025

Evident sprials on an aloe plant from UC Berkeley Botanical Garden

Episode

423

Fibonacci Sequence

June 3, 2025

An oil painting from 1889 by Alber Bierstadt of titled, “Mount St. Helens, Columbia River, Oregon.”

Episode

420

Mount St. Helens Eruption

May 13, 2025

Sunrise on the Tetons

Episode

418

Grand Teton National Park

April 29, 2025

The Wallace Line is an imaginary boundary that separates diverse animal populations found on the Southeast Asian Sunda and Australian Sahul continental plates.

Episode

415

Mystery of the Wallace Line

April 8, 2025

Barents Sea to the west of Russia’s Yuzhny Island bloomed with beautiful current-borne swirls of phytoplankton.

Episode

410

Essential Algae

March 4, 2025

An engraving from the seventeenth century of Hercules assisting Atlas to carry Earth, by Claude Mellan (1598–1688)

Episode

409

We Moved the North Pole

February 25, 2025

The Rancho La Brea Tar Pool as depicted by Charles R. Knight in 1921

Episode

405

Where Did the Giant Mammals Go?

January 28, 2025

A frozen wood frog held in the lab.

Episode

403

Frogsicles

January 14, 2025

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