PBS Space Time | How We Know The Earth Is Ancient @pbsspacetime | Uploaded 4 years ago | Updated 11 hours ago
PBS Member Stations rely on viewers like you. To support your local station, go to: http://to.pbs.org/DonateSPACE
More info below

Sign Up on Patreon to get access to the Space Time Discord!
https://www.patreon.com/pbsspacetime

Sign up for the mailing list to get episode notifications and hear special announcements!
https://mailchi.mp/1a6eb8f2717d/spacetime

Check out the Space Time Merch Store
https://pbsspacetime.com/

In astronomy we talk about billions of years like its no big deal. But how can we be sure about timescales so far beyond the capacity for human intuition? Our discovery of what we now call deep time is very recent - as recent as our discovery of the true spatial vastness of our universe. And it came as scientists tried to measure the age of the Earth. What they found was as shocking and humbling as anything seen through the telescope.

Hosted by Matt O'Dowd
Written by Dan Falk & Matt O'Dowd
Graphics by Leonardo Scholzer, Yago Ballarini, & Pedro Osinski
Directed by: Andrew Kornhaber
Executive Producers: Eric Brown & Andrew Kornhaber

End Credits Music by J.R.S. Schattenberg: https://www.youtube.com/channel/UCRl6-nb4iOnsij-vnpAjp0Q

Special Thanks to Our Patreon Supporters!

Big Bang Supporters
Alexander Tamas
David Nicklas
Fabrice Eap
Juan Benet
Morgan Hough
Radu Negulescu

Quasar
Christina Oegren
Mark Heising
Vinnie Falco

Hypernova
william bryan
chuck zegar
Danton Spivey
Donal Botkin
Edmund Fokschaner
Hank S
John Hofmann
John Pollock
John R. Slavik
Jordan Young
Joseph Salomone
Julian Tyacke
Mathew
Matthew O'Connor
Matthew Ryan
Syed Ansar
Timothy McCulloch

Gamma Ray Burst
A G
Adrian Hatch
AlecZero
Andreas Nautsch
Bradley Jenkins
Brandon labonte
Brandon Lattin
Brian Blanchard
Craig Stonaha
Dan Warren
Daniel Lyons
David Bethala
David Hughes
DFaulk
Douglas Cantrell
Eric Kiebler
Frederic Simon
Geoffrey Short
Graydon Goss
Greg Smith
John Funai
John Robinson
Josh Thomas
Justin Waters
Kevin Lee
Kevin Warne
Kyle Hofer
Malte Ubl
Michael Conroy
Mirik Gogri
Nick Virtue
Nick Wright
Nickolas Andrew Freeman
Patrick Sutton
Paul Rose
Protius Protius
Randall Sylvia
Robert Ilardi
Scott Gossett
Sean Warniaha
Shane Calimlim
Steve Bradshaw
Tatiana Vorovchenko
Tim Stephani
Tonyface
Tybie Fitzhugh
Yannick Weyns
Yurii Konovaliuk

How Do Quantum States Manifest In The Classical World?

How Quantum Entanglement Creates Entropy

What if Humans Are NOT Earths First Civilization? | Silurian Hypothesis

$What Caused the Big Bang? PBS Member Stations rely on viewers like you. To support your local station, go to: http://to.pbs.org/DonateSPACE More info below Check out the new Space Time Merch Store! https://pbsspacetime.com/ Support Space Time on Patreon https://www.patreon.com/pbsspacetime Every astronomy textbook tells us that soon after the Big Bang, there was a period of exponentially accelerating expansion called cosmic inflation. In a tiny fraction of a second, inflationary expansion multiplied the size of the universe by a larger factor than in the following 13 and a half billion years of regular expansion. This story seems like a bit of a stretch. Is there really any mechanism that could cause something like this to happen? What what were covering today the real physics of cosmic inflation. Hosted by Matt ODowd Written by Matt ODowd Graphics by Leonardo Scholzer Directed by Andrew Kornhaber Produced By: Kornhaber Brown Dark Energy Playlist: https://www.youtube.com/playlist?list=PLsPUh22kYmNA6WUmOsEEi32zi_RdSUF4i The Quantum Vacuum and Hawking Radiation Playlist https://www.youtube.com/watch?v=OvgZqGxF3eo&list=PLsPUh22kYmNAHB1W2_Ka2F83sObdczwKr Most cosmologists buy some variation of the inflation hypothesis. It seems to very neatly solve some of the biggest questions in cosmology. Those being: why is matter and energy so smoothly spread out across the entire observable universe? And why is the geometry of the universe so flat? Neither should be expected unless the universe expanded much more rapidly early on. We explored these problems in an earlier video worth a look if you really want to get inflation. Another problem fixed by inflation is the absence of magnetic monopoles strange particles predicted to have been produced in the early universe. Well come back to those another time. Big Bang Supporters: Anton Lifshits David Nicklas Fabrice Eap Juan Benet Justin Lloyd Morgan Hough Quasar Supporters: Mark Heising Mark Rosenthal Tambe Barsbay Vinnie Falco Hypernova Supporters: Chuck Zegar Danton Spivey Donal Botkin Edmund Fokschaner Hank S John Hofmann John R. Slavik Jordan Young Joseph Salomone kkm Mark Heising Matthew Matthew OConnor Syed Ansar Gamma Ray Burst Supporters: Adrien Hatch Alexey Eromenko Andreas Nautsch Bradley Jenkins Brandon Labonte Carlo Mogavero Daniel Lyons David Behtala DFaulk Dustan Jones Geoffrey Short James Flowers James Quintero John Funai John Pollock Jonah Jonathan Nesfeder Joseph Dillman Joseph Emison Josh Thomas Kevin Warne Kyle Hofer Malte Ubl Mark Vasile Nathan Hitchings Nick Virtue Paul Rose Ryan Jones Scott Gossett Sigurd Ruud Frivik Tim Jones Tim Stephani Tommy Mogensen Yurii Konovaliuk$

Was Penrose Right? NEW EVIDENCE For Quantum Effects In The Brain

Interstellar Expansion WITHOUT Faster Than Light Travel

How We Know The Earth Is Ancient @pbsspacetime