Documentarymania

Simply the Best Documentaries

 Share on Twitter  Share on Google+
Top Science Stories of 2017
David Attenborough Meets President Obama
The First Christianity
Narco Cultura
Journey to the Edge of the Universe
Rivals
Leaping Tigers Naked Nagas
Marvel 75 Years: From Pulp to Pop!
Reel Rock 10
The Normans: Normans of the South
Streetlife
Conquistadors: The Fall of the Aztecs
Finding Atlantis
Jacques-Louis David
The Milky Way
Frozen Planet: Spring
Allergy Planet
Neptune and Uranus
Fascination Coral Reef
The Great European Disaster Movie
Michael Moore in TrumpLand
Tales by Light Adrenaline
The Worst Car in the History of the World
Why Do Viruses Kill
Through the Wormhole Season 6: Are We Here for a Reason
Ants: Secret Power of the Nature
The True Cost
The Art of Flight
Planet Ocean
Dark Net Provoke
Silk Roads and China Ships
Planet Ant Life inside the Colony
The Art Of The Impossible
Comets:  Frozen Wanderers
Ancient Rome: Revolution
The Most Dangerous Place in the Universe

Order by   Views  Year  New Added  Featured  Title

The Clean Room
The Clean Room 2014

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.

Category:Science  Duration:42:00   Series: Cosmos 2014

 
Showing 1- 1  of 1          

Follow our releases!



In  Facebook  


© Documentary Mania 2017