你知道吗？圣诞树最初只是德国的一种“奇怪习俗”，连圣经里都没有提过。它如何从欧洲宫廷走进平民家庭，又最终成为全球节日的标志？
From satellite, you can spot them in the green speckles.
Christmas Tree Farm.
Christmas tree far… Actually, that's Mount Rushmore.
Christmas Tree Farm.
Let's get to it.
Why do people have Christmas trees in their house?
They aren't in the Christian Bible.
And it's such a new tradition that only one of these four guys had one in the White House.
The real story of Christmas trees involves a lost Grand Duchy, 1840 influencers, and the unlikely birth of a custom you can see from space.
Christmas tree like stuff has been going on for a while, as imagined in this picture of the pagan Roman Saturnalia.
