A process called cryopreservation allows cells to remain frozen but alive for hundreds of years. For some animal cells, the moon is the closest place that's cold enough ..read more

This Earth Day, learn about the millions of species of plants and animals and the vital role they all play in the planet's future ..read more

Photographer James Balog has become one of the foremost chroniclers of human-caused climate change, as his cameras have tracked the dramatic effects – vanishing ice, rising seas, fires, and the toll climate change is taking on all living things. He tells correspondent Ben Tracy that his photos are his testimony, a record of our past and present, and a message for the future ..read more

To protect the movement of wildlife impeded by busy roadways, a series of manmade overpasses and underpasses throughout the U.S. helps animals big and small safely get across the street, preventing collisions and saving human lives ..read more

To protect the movement of wildlife impeded by busy roadways, a series of manmade overpasses and underpasses throughout the United States helps animals big and small safely get across the street, preventing collisions and saving lives. About 1,500 of these structures already have been built. Correspondent Conor Knighton looks at how they have protected genetic diversity in animal populations while also greatly reducing roadkill. He also visits the site of the Wallis Annenberg Wildlife Crossing near Los Angeles, which when complete will help cougars cross one of the busiest highways in the coun ..read more

A report from the United Nations determined that 1 million species are threatened with extinction. Dr. John Wiens from the University of Arizona believes that number is far higher based on his research. He says climate change is quickening the threat of extinction for species, including a 3-million-year-old lizard population previously found in the Arizona mountains ..read more

A disappearing lizard population in the mountains of Arizona shows how climate change is fast-tracking the rate of extinction ..read more

Scientists are using a range of tools to protect the endangered wildlife that could disappear in coming decades ..read more

A human jawbone containing several teeth was linked to a former U.S. Marine who died almost 75 years ago during a military exercise in California ..read more

The recent births of Noreen and Antonia are boosting hopes of diversifying the endangered species ..read more