Nell, Simon, and their son Art are ready to welcome friends and family for what promises to be a perfect Christmas gathering. Perfect except for one thing: everyone is going to die.

A team of archaeologists unveil a collection of fossils which could potentially belong to a gap in the record of the origins of mankind.

Explorers discover a clue that may point to the origins of mankind on Earth and leads them to a distant planet.

America's national mammal sustained the lives of Native people for untold generations before being driven to the brink of extinction, eventually prompting an unlikely collection of people to rescue it from disappearing forever.