SCIENCE

Do We Still Need the Clean Air Act?

EcoSense for Living

Do We Still Need the Clean Air Act?

Dr. Devra Davis, an environmental health expert and author, tells us how Donora, PA slowly awakened America's need for the Clean Air Act. Mom's Clean Air Force are mothers concerned about the effects of two different sources of air pollution. In Pennsylvania, parents guard their children's health against chemicals associated with fracking. In Orlando, we meet a mom engineer/artist who uses her paintings to express her concern about a nearby power plant. Don Anair of the Union of Concerned Scientists talks electric cars, evolving attitudes about carpools and rideshares, and whether or not car ownership is worth the price of admission.

The Egg: Life’s Perfect Invention

Nature

The Egg: Life’s Perfect Invention

How is an egg made? Why are they the shape they are? And perhaps most importantly, why lay an egg at all? Step by step as the egg hatches, host David Attenborough reveals the wonder behind these incredible miracles of nature. Watch now.

Future Food

Ecosense for Living

Future Food

Dr. Katharine Wilkinson, the senior writer of DrawDown, tells us how much our food choices affect our health and climate change. In New Orleans, the Audubon Nature Society promotes an annual sustainable seafood dinner. "Bug Apetit!" explores serving up a better future. Take crickets, for instance! High in protein, they're hopping into popular culture in New York City and London.

Charles Graeber On Immunotherapy and a Paradigm Shift in Cancer Treatment

Great Conversations:

Charles Graeber On Immunotherapy and a Paradigm Shift in Cancer Treatment

New York Times bestselling author Charles Graeber discusses his book, The Breakthrough: Immunotherapy and the Race to Cure Cancer, that details revolutionary scientific research in immunotherapy, with Dr. Thomas Gajewski, who oversees the melanoma oncology clinic at the University of Chicago and leads the immunology and cancer program at the university's Comprehensive Cancer Center. The interview was recorded at the University of Louisville Kentucky Author Forum.

Mammoth Bones from Kentucky

Kentucky Life

Mammoth Bones from Kentucky

In the late 18th and early 19th century, Northern Kentucky was a hotbed of fossil discovery. Big Bone Lick State Historic Site is now located where many of those fossils were found, and is named for the salt springs and mineral deposits that attracted ancient animals to the area.

Einstein’s Quantum Riddle

NOVA

Einstein’s Quantum Riddle

Quantum entanglement is poised to revolutionize technology from networks to code breaking–but first we need to know it’s real. Join physicists as they capture light from across the universe in a bid to prove Einstein’s “spooky action at a distance.”

Pluto and Beyond

Nova

Pluto and Beyond

Since it explored Pluto in 2015, the New Horizons spacecraft has been zooming toward NASA’s most distant target yet. Join the mission team as the probe attempts to fly by Ultima Thule, an object 4 billion miles from Earth.

Apollo’s Daring Mission

Nova

Apollo’s Daring Mission

Apollo astronauts and engineers tell the inside story of how the first mission to the moon, Apollo 8, pioneered groundbreaking technologies that would pave the way to land a man on the moon and win the space race.

POV Shorts: Earthrise

POV Shorts

POV Shorts: Earthrise

This film tells the story of the first image captured of the Earth from space in 1968. Told solely by the Apollo 8 astronauts, it recounts their experiences and explores the beauty and grandeur of the Earth against the blackness of space.

Nature: Snow Bears

Nature

Nature: Snow Bears

Travel to the Arctic to follow the life-changing journey of two newborn polar bear cubs as they leave their den for the first time. Bravely led by their mother, the cubs must make the perilous voyage to the sea to feed. Actress Kate Winslet narrates.