Hey everyone, it's Kristen from True Crime Creepers.

Every week I tell my friend in True Crime Newby Mogab about a case she's never heard before, but that I've been obsessing over.

We talk about all the real-life creeps, from serial killers to con artists.

So if you're into dark tales with a touch of humor. Tune in wherever you get your podcasts.

All right.

So contrary to popular belief, a decent percentage of the human population has known

definitively the Earth was roughly spherical for over 2,000 years.

This is hardly impressive, as we noted in our Brain Food Show podcast, which you should also

check out.

Bees also used this fact in their own absurdly fascinating navigation and in communicating

directions to other bees.

As for humans, we took a little longer to realize this, with Pythagoras from the 6th

century BC, generally credited with being the first known person to have suggested a spherical Earth, though the idea didn't exactly catch on at that point.

Aristotle, 4th century BC, agreed and supported the hypothesis with observations such as

that the southern constellations rise higher in the sky when a person travels south.

He also noted that during a lunar eclipse, the Earth's shadow is round.

Much more definitively, the 3rd century BC head librarian of the Library of Alexandra

Aristotosthenes built on their ideas and managed to calculate the circumference of the

Earth with remarkable accuracy.

How?

He simply used the knowledge that at noon on the summer solstice there was a well in Syne,

where the sun shone directly down to the bottom, with no shadow.

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