Paleontologist Kirk Johnson explores the polar extremes of the planet, including miles-high ice sheets and warm polar forests brimming with life.
A look at dog domestication, how scientists test wolf intelligence and decode canine DNA, and what science says about a dog's love for humans.
The perplexing behaviors of cats have often raised the question of whether humans ever really domesticated felines.
Cuban scientists develop their own biotech industry, including lung cancer vaccines that may give new hope to patients around the world.
The mysteries of fat and its role in hormone production, hunger and pregnancy.
Doctors strategize to stop the spread of COVID-19; researchers work toward finding treatments and vaccines; how the disease emerged, what it does to the human body, and how it became a pandemic.
Up-close footage provides a look at the strength, eyesight and flying skills of an eagle, and reveals the danger and drama of chicks as they struggle to survive.