Documentarymania

Simply the Best Documentaries

 Share on Twitter  Share on Google+
Let there be Life
One Life on the Limit
Beyond Thinking
The Lost Tribes of Humanity
The Vikings Uncovered
The Language of Science
CTRL
The End of the Universe
Courtship
Archimedes Secret
In The Sign Of The Cross
Ghosts of the Abyss
Age of Empire
Is your Brain Male or Female
Dinosaurs Alive
The Gatekeepers
Frozen Planet: Autumn
1945 The Savage Peace
The Southwest Islands
Cooked: Air
Hitler and the Occult
Kingdom of the Blue Whale
Our Voyage to the Stars
Earth, the Power of the Planet: Atmosphere
The Most Dangerous Band in the World. The Story of Guns N Roses
The Nazis, A Warning From History. Episode 1
When Knowledge Conquered Fear
Saturn Lord of the Rings
Black Holes
Enchanted Kingdom
The Art Of The Impossible
Turtle Power The Definitive History of the Teenage Mutant Ninja Turtles
Bomb It
Shine a Light 2of2
Deep Sea
Neanderthal 1

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 2018