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Chemtrails

Chemtrails

Season 5 Episode 4
2:29
What Are Century Eggs?

What Are Century Eggs?

Season 5 Episode 8
2:52
Cow Burps Are Warming the Planet

Cow Burps Are Warming the Planet

Season 5 Episode 9
2:49
What's That After-Rain Smell Made Of?

What's That After-Rain Smell Made Of?

Season 5 Episode 11
3:58
Why Can’t You Buy Fresh Olives?

Why Can’t You Buy Fresh Olives?

Season 5 Episode 12
3:15
Burning Ice from the Ocean Floor

Burning Ice from the Ocean Floor

Season 5 Episode 14
3:44
How Do Airbags Work?

How Do Airbags Work?

Season 5 Episode 15
3:11
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The Race to Invent the Periodic Table

Season 5 Episode 3

We look at the chemistry of gallium, the science behind the holes in the periodic table, and the history of how the elements fell into place. Some chemists might see the periodic table of elements as a holy testament to the power of science. However, when it first debuted, it was a different kind of holey, and its journey to classroom walls everywhere had a whole lot of bumps.