Extras
An intimate portrayal of three families confronting the unique challenges of Alzheimer’s.
Gavin Svenson heads to the Brazilian rainforest to sample the diversity of mantises.
Nancy’s wedding plans take a surprising turn. Sister Catherine takes her First Vows.
Forensic science is put to the test after the first-ever staged multi-vehicle pileup.
An elusive photographer uses street art tactics to share his previously unknown work with the world.
Jesse Barber and Akito Kawahara study the evolutionary arms race between bats and moths.
Monarch butterflies winter in the fir forests of Michoacan, Mexico, after an epic migration.
Joyce faces a disciplinary hearing over a recent complaint which has been upheld.
A first-of-its-kind experiment aims to stage a multi-vehicle pileup to gain new data on car safety.
A four-part investigation into insect declines, exploring their diversity and ecological importance.
Latest Episodes
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Untold Earth Season 2
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Untold Earth Season 1
What secrets can we unearth about the future of our planet from this petrified forest in Arizona?
Discover how The Atchafalaya Basin protects Louisiana's coast from hurricanes.
Meet Pando, an ancient tree in Utah that has grown into one of Earth's largest living wonders.
How are truffles key to the survival of the forest ecosystem at large?
What does it mean to preserve a place that is defined by it's impermanence?
Microbial warfare has been raging for thousands of years deep below the Chihuahuan Desert.
What does one of Earth's harshest environments teach us about planet survival?
At 87º Celcius, the Grand Prismatic Spring is a beacon of microbial life and discovery.
At 50 million years old, the origins of Devils Tower or Bears Lodge remains a mystery.
An ancient and modern mystery, what about bioluminescence inspires such obsession?