The North Atlantic right whale is on the brink of extinction. But a handful of specialists are determined to help save it as they discover new secrets about the lives of these giants of the sea.

As extreme weather in the U.S. impacts more people – with longer heat waves, more intense rainstorms, megafires, and droughts – discover how Americans are fighting back by marshaling ancient wisdom and innovating new solutions.

Colossal explosions shake a remote corner of the Siberian tundra, leaving behind massive craters. In Alaska, a huge lake erupts with bubbles of inflammable gas. Scientists are discovering that these mystifying phenomena add up to a ticking time bomb, as long-frozen permafrost melts and releases vast amounts of methane, a potent greenhouse gas.

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.”

Scientists are coming to understand fat as a dynamic organ—one whose size may have more to do with biological processes than personal choices. Explore the mysteries of fat and its role in hormone production, hunger, and even pregnancy.

Join scientists as they use NASA’s brand new James Webb Space Telescope to peer deep in time to hunt for the first stars and galaxies in our universe, and try to detect the fingerprints of life in the atmospheres of distant exoplanets.

Recent discoveries in archaeology are exploding the myth of the Amazon as a primeval wilderness, revealing traces of ancient civilizations that flourished for centuries, with populations numbering in the millions.

NOVA: Zero to Infinity takes a look at how the mathematical concepts of zero and infinity have been invented and re-invented by different cultures over thousands of years.

One of the world’s greatest ancient enigmas, the Nazca lines are a dense network of criss-crossing lines, geometric shapes, and animal figures etched across 200 square miles of Peruvian desert. Who created them and why? Ever since they were rediscovered in the 1920s, scholars and enthusiasts have raised countless theories about their purpose.

In police departments and courts across the country, artificial intelligence is being used to help decide who is policed, who gets bail, how offenders should be sentenced, and who gets parole. But is it actually making our law enforcement and court systems fairer and more just? This timely investigation digs into the hidden biases, privacy risks, and design flaws of this controversial technology.