106: The Polygraph & Dentistry History

Let's Learn Everything!

Tom Lum

Education, Comedy, Learning, Tiktok, Science, Friends

4.8 • 547 Ratings

🗓️ 21 May 2026

⏱️ 118 minutes

🔗️ Recording | iTunes | RSS

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Summary

You may know the polygraph is junk science, but what is the real science of lying and what wild turns did the polygraph take to get to today? And how old is dentistry? If ancient cave men didn't brush why do I have to? Well it turns out for good reason, and some fascinating dental science.

Transcript

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0:00.0	I'm gonna get the theme song ready for my friends to listen to.
0:05.9	They like the theme song.
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0:11.4	Here they are.
0:12.1	Let's learn everything.
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0:15.7	It has a song and these are the lyrics.
0:20.3	We are science people.
0:24.2	Oh, thank God I found it.
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0:27.3	Oh, God.
0:28.0	I'm already out of energy. Hello and welcome to Let's Learn Everything, the show where we learn about anything and everything,
0:48.7	and everything interesting.
0:50.3	Today, we're going to hit you with a science topic.
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0:58.0	Bosh!
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1:01.4	My name is Ella, and today I bring no topics for I am the student.
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1:09.8	My name's Tom, and today's science topic is a series of questions.
1:15.8	Actually, before I ask them, Ella, can you put on these diodes really quick?
	...

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