Back to Show
NOVA
Could Whale Poop Help Cool the Planet?
Whales are massive reservoirs of carbon and they are key to the health of our oceans. But there are fewer whales — and less whale poop — in the ocean today than before industrial whaling took off.
Support Provided By
53:31
Discover the fascinating chemistry that makes our world and everything in it—including us.
53:21
Can bringing predators—and fear—back into an ecosystem help restore its natural balance?
1:52:46
Paleontologist Kirk Johnson explores the dynamic history—and future—of ice at the poles.
53:30
Discover the science behind Leonardo da Vinci's masterpieces—and Mona Lisa's iconic smile.
53:15
Amazing fossils reveal how mammals took over after an asteroid wiped out the dinosaurs.
Unlock with PBS Passport
53:32
Discover why scientists and entrepreneurs alike have their sights set on the Moon again.
Unlock with PBS Passport
53:23
New archeological evidence shows the stunning engineering of the Great Pyramid of Giza.