Up Next
Back to Show
Reactions
How Do We Know How Old the Earth Is?
Season 4
Episode 31
Since there’s no “established in” plaque stuck in a cliff somewhere, geologists deduced the age of the Earth thanks to a handful of radioactive elements. With radiometric dating, scientists can put an age on really old rocks — and even good old Mother Earth. For the 30th anniversary of National Chemistry Week, this edition of Reactions describes how scientists date rocks.
Support Provided By
10:31
Forever Chemicals last… forever. Can a new technology finally send them to their doom?
8:21
Reducing the carbon footprint of concrete and cement by relying on biology.
9:13
Mosquitos really do prefer some people over others, and this Reactions ep explains why!
13:50
Discover the single most important chemical reaction on Earth, and why we need to kill it.
9:38
This week Reactions dives into something truly out-of-this-world: amorphous ice.
15:51
Are we about to re-define meat? If so, what is meat?!
10:37
Why has the European Union banned certain colors for tattoos?
12:29
Can we solve electric vehicle fires before we fully understand what’s happening?
15:58
Fluffy, delicious bread results when starch gelatinization and flour chemistry combine!
12:35
Join George (and, occasionally, Andrew) as they chart corn’s epic chemical journey.
