A Volcanic Labyrinth

Season 40 Episode 1

About the Episode

Thrihnukagigur crater is the only place on Earth where the anatomy of a volcano can be studied from the inside. When geologists journeyed into its heart, they discovered that a network of fissures links together distant volcanoes.

Aired: | Expires: | Runtime: 2m 59s

Recent Episodes

Episode 11, Season 52<br> Ultimate Crash Test: Impact

Forensic science is put to the test after the first-ever staged multi-vehicle pileup.

NOVA

| 53:27
Episode 10, Season 52<br> Ultimate Crash Test: Countdown

A first-of-its-kind experiment aims to stage a multi-vehicle pileup to gain new data on car safety.

NOVA

| 53:29

Become a GBH sponsor

Extras

This Massive Skeleton Belongs to an Ancient Whale

At first, scientists thought it was a gigantic marine reptile.

2:28
How Music is Made Up of Math

Pythagoras saw a connection between math, music, and nature.

2:01
Critical Condition: Health in Black America Preview

After centuries of pseudoscience, researchers examine the causes of racial health disparities.

0:30
How Deadly Was the Musket?

A team of experts put an 18th-century musket to the test — revealing how deadly it really was.

4:57
The World’s First Combat Submarine

Its nickname was the “Turtle”.

10:49
These Smart Glasses Know Who You Are, and Much More

Two students created glasses that can identify people on the street, without them knowing.

4:18
Why Just Planting Trees Won’t Save the Planet

Could restoring lost forests help slow climate change?

3:04
Ultimate Crash Test: Impact Preview

Forensic science is put to the test after the first-ever staged multi-vehicle pileup.

0:30
When Machines Prescribe

Investigate medical algorithms in which the patient’s race drives decisions.

17:19
Do Plants Know Math?

Evolution seems to favor these numbers.

2:24

What matters to you.