This episode is brought to you by Pepsi Max. Christmas is great, but there's loads of ways to make it better.

Like sneaking some chili into the gravy for some extra oint, or building a playlist that will even get your

none up on the table or just cracking open an ice cold Pepsi Max.

Christmas.

Better with Pepsi Max.

Hey guys, Nate Hale here.

Before we get started, I wanted to let you know this episode includes a special guest

Nathan Lloyd of historical blindness the Odd Past podcast

If you haven't listened to historical blindness yet you really need to check it out

In each episode Nathan yet you really need to check it out.

In each episode, Nathan sheds light on odd moments from history,

filling in the gaps in what we think happened,

and clearing up the many misconceptions we have about the past.

It's a really great show. And if you check out Nathan's latest episode about the Green Children of

Woolpet, you'll also hear a bit of yours truly, who got the great honor to make his own guest appearance.

And now, on with my show. Edmund Hallie was an English mathematician and astronomer, who most of us know from the famous

comet that bears his name.

Contrary to popular belief,

Halley did not actually discover the comet.

Rather, he determined something much more important.

The comets do not travel in straight lines or parabolic

orbits.

...