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Stopping Armageddon

   2009    Technology
It sounds like a Hollywood blockbuster: a deadly asteroid is on a collision course with Earth. But in reality, it's only a matter of time before a giant space rock threatens to wipe out civilization. An asteroid took out the dinosaurs sixty-five million years ago. Are we next? This episode analyzes the threat and explores the many ways--from a nuclear bomb to ingenious new technology--that experts are proposing to stop Armageddon
Series: The Universe

The Clean Room

   2014    Science
This episode is centered around how science, in particular the work of Clair Patterson (voiced in animated sequences by Richard Gere[33]) in the middle of the 20th century, has been able to determine the age of the Earth. Tyson first describes how the Earth was formed from the coalescence of matter some millions of years after the formation of the Sun, and while scientists can examine the formations in rock stratum to date some geological events, these can only trace back millions of years. Instead, scientists have used the debris from meteor impacts, such as the Meteor Crater in Arizona, knowing that the material from such meteors coming from the asteroid belt would have been made at the same time as the Earth. Patterson also examined the levels of lead in the common environment and in deeper parts of the oceans and Antarctic ice, showing that lead had only been brought to the surface in recent times. He would discover that the higher levels of lead were from the use of tetraethyllead in leaded gasoline resulting in government-mandated restrictions on the use of lead.
Series: Cosmos 2014

The Lost Worlds of Planet Earth

   2014    Science
This episode explores the palaeogeography of Earth over millions of years, and its impact on the development of life on the planet. Tyson starts by explaining that the lignin-rich trees evolved in the Carboniferous era about 300 million ago, then explains on the nature of plate tectonics that would shape the landmasses of the world and the asteroid impact that initiated the Cretaceous–Paleogene extinction event, leaving small mammals as the dominate species on earth. Earth's landmasses are expected to change in the future and postulates what may be the next great extinction event.
Series: Cosmos 2014

Human Universe: What is our Future

   2014    Technology
Professor Brian Cox concludes his exploration of humanity's place in the cosmos by examining what the future holds. In Florida, he learns about the latest efforts to protect Earth from potential catastrophic events and joins a team of Nasa astronauts who are in a submerged laboratory that simulates space as they train for a future mission to an asteroid - should one ever be discovered heading to Earth. At the National Ignition Facility in California, the physicist witnesses the world's most successful fusion experiment in action, one which he believes may unlock a way to the stars that will not destroy the planet in the process.
Series: Human Universe

Extreme Orbits - Clockwork and Creation

   2012    Science
Orbits are the dynamics that drive the universe. From the smallest asteroid to the largest super-cluster, everything in the universe is in orbit. We owe our very existence to the stability of earth's orbit — it gave us life and keeps us safe. But we are the freaks. Everywhere else we look we find orbits are chaotic, unstable, and violent. Beyond our solar system we find planets that are blow-torched, stars that eat each other, and black holes that destroy everything in their path. Yet on the very largest scale, orbits are also a creative force. clashing galaxies give birth to new stars and new worlds. on the galactic scale orbits even construct the fabric of the universe itself.
Series: How the Universe Works
How Earth Made Us
How Earth Made Us

   2010    Science
Apocalypse: World War 1
Apocalypse: World War 1

   2014    History
Himalaya with Michael Palin
Himalaya with Michael Palin

   2004    Culture
Through the Wormhole
Through the Wormhole

   2011    Science
Nova Wonders
Nova Wonders

   2018    Science
Dangerous knowledge
Dangerous knowledge

   2007    Science
The Normans
The Normans

   2010    History
The Universe
The Universe

   2010    Science