Origins of Christmas Cards

Learn how the tradition of Christmas cards got started.
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The Weirdest Habits Of 6 Famous Billionaires
The Weirdest Habits Of 6 Famous Billionaires
This Terrifying Glass Floor On Thailand Skyscraper Is Not For Faint-Hearted
This Terrifying Glass Floor On Thailand Skyscraper Is Not For Faint-Hearted
This floating underwater hotel room is what dreams are made of
This floating underwater hotel room is what dreams are made of
The eerie sound of solar wind
The eerie sound of solar wind
The lake with 'trampoline' islands
The lake with 'trampoline' islands
This Icelandic Delicacy Is Made Using Rotten Shark
This Icelandic Delicacy Is Made Using Rotten Shark
Grand Canyon Fills With Ocean Of Clouds On Rare Occasions
Grand Canyon Fills With Ocean Of Clouds On Rare Occasions
NASA's 450,000-gallon water fountain
NASA's 450,000-gallon water fountain
7 Amazing Things Your Body Does During Sleep
7 Amazing Things Your Body Does During Sleep
This English well turns teddy bears into stone
This English well turns teddy bears into stone
Leaving The Real Animals Alone, This German Circus Uses Holograms Instead
Leaving The Real Animals Alone, This German Circus Uses Holograms Instead
The world's biggest parking lot holds 4,000 U.S. military aircraft
The world's biggest parking lot holds 4,000 U.S. military aircraft
Elon Musk's 5 Wildest Predictions
Elon Musk's 5 Wildest Predictions
New Zealand's Glowworm Caves Transport You To A Magical World
New Zealand's Glowworm Caves Transport You To A Magical World
7 Mind-Bending Plants That'll Change How You See The World
7 Mind-Bending Plants That'll Change How You See The World
Watch this seahorse launch a strike in 1 millisecond
Watch this seahorse launch a strike in 1 millisecond
Go Inside One Of The World's Most Haunted Prisons
Go Inside One Of The World's Most Haunted Prisons
5 Men In Race To Be The First Trillionaire
5 Men In Race To Be The First Trillionaire
This hotel lets you 'sleep with lions'
This hotel lets you 'sleep with lions'
Top 10 Accidental Food Inventions
Top 10 Accidental Food Inventions