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Miners split open a once-in-a-lifetime geode containing amethyst crystals in the shape of a heart.

Episode

414

Potato Stones and Thunder Eggs

April 1, 2025

A forest impacted by wildfire in winter.

Episode

413

Wildfires Impact Snowpack

March 25, 2025

Dr. Larry Barham, from the University of Liverpool in the United Kingdom, works on the excavation of the tree trunk found alongside a wedge (object b in the following figure) dated at around 476,000 years old.

Episode

412

The Wood Age

March 18, 2025

This cross section of Earth's interior is not to scale

Episode

411

Earth’s Two Crusts

March 11, 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

A great horned owl in flight over a meadow in Ontario, Canada.

Episode

408

Secrets of Silent Flight

February 18, 2025

Narwhals breaching.

Episode

407

Unicorns of the Sea

February 11, 2025

The landscape of Antarctica as it would appear if the ice were lifted away

Episode

406

Extreme Antarctica

February 4, 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

Pyramids of the Giza Necropolis

Episode

404

Mystery of the Pyramids Solved

January 21, 2025

A frozen wood frog held in the lab.

Episode

403

Frogsicles

January 14, 2025

NASA/ESA Hubble Space Telescope captured a photo sequence of four moons of Saturn passing in front of their parent planet. The moons, from far left to right, are the white icy moons Enceladus and Dione (each preceded by their own shadow), the large orange moon Titan, and icy Mimas.

Episode

402

How Planets Get Moons

January 7, 2025