Near the start of the 20th century, a mysterious and deadly virus terrified Americans, particularly infecting young kids: Polio. Correspondent Rita Braver looks at the scientific arsenal brought to combat the epidemic and develop a vaccine, and talks with documentary filmmaker Carl Kurlander ("The S

There is a whole ocean of rarely seen creatures that run the gamut in terms of appearance and sizes. Some of the following animals live deep down in the waters and rarely or never see the rays of our sun. These particular animals live in environments so drastically different than any other animals ...

Forty world leaders are taking part in a climate change summit hosted by US President Joe Biden. Alice Hill, David M. Rubenstein Senior Fellow for Energy and the Environment at the Council on Foreign Relations, shared her thoughts on the meeting.

The World is Watching Cities, Now More than Ever. The US withdrawal from the Paris Climate Accord brought cities into the spotlight. Because cities and mayors are acting now, and we must be right beside them as they become necessary leaders in this vital cause. As the world moves forward from Paris,...

A black-footed ferret named Elizabeth Ann is the first endangered species to be cloned, created from the cells of a ferret that lived 30 years ago. It's hoped that she will increase the genetic diversity of her species.

According to ancient astronaut theorists, Ramanujan, the mathematician who lived almost a hundred years ago and whose breakthroughs helped form the basis of superstring theory and multidimensional physics, claimed to have been influenced by otherworldly beings in this clip from Season 11, Episode 5,...

Palm trees are a diverse, complex group of plants, with about 2,500 species of mostly tropical origin. All of them reproduce from seed. For palms with single trunks, it's the only way they reproduce. For palms that cluster or branch, an offset or branch can root to make a new plant. For seed formati...

We visited the "Love the Golden Rule" Clinic in Saint Petersburg, Florida to follow up on a story that started 30 years ago when Dr Bob Wallace, the medical director of the clinic help save the life of a patient in the operating room. They had to give him a blood transfusion which resulted in the p...

Academy Award-winning filmmaker Alex Gibney, directing with Ophelia Harutyunyan and Suzanne Hillinger, interrogates this question and its devastating implications in Totally Under Control. With damning testimony from public health officials and hard investigative reporting, Gibney exposes a system-w

The COVID-19 crisis has been compared to the Spanish flu pandemic that killed millions around the world in 1918. That disease affected everything from the results of World War I to the development of public health systems. But despite its name ... the Spanish flu isn’t actually from Spain. And can w