Extras
Follow the complex lives of giant elephant bulls in Amboseli and Mount Kilimanjaro.
Male elephants form powerful bonds — and even become adoptive parents together.
In Amboseli, one male’s opportunity attracts rivals — and the attention of watching juveniles.
Esau’s journey spans borders that elephants cannot see — but must obey.
Latest Episodes
See how ingenuity and teamwork keep the crew alive and doing science 250 miles above Earth.
Astronauts and Mission Control relive terrifying moments during construction of the ISS.
Find out why deadly flash floods are on the rise and how we can protect ourselves from them.
Explore mysterious 9,000-year-old Stone Age megastructures found in the Arabian Desert.
Discover how two revolutionary ancient inventions changed the course of humanity forever.
Discover how Homo sapiens outlasted Neanderthals – and how they helped make us who we are today.
Follow Homo sapiens as they venture out of Africa and spread farther than any other human species.
Archaeological discoveries reveal traces of ancient civilizations in the Amazon.