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Preview thumbnail for video'Terrifying Mammals That May Have Greeted Early Humans in America
Terrifying Mammals That May Have Greeted Early Humans in America (2:32)
Preview thumbnail for video'The Startling Alternative Theory of How Humans Arrived in America
The Startling Alternative Theory of How Humans Arrived in America (2:51)
Preview thumbnail for video'This Molecule Could Explain the Origin of Life
This Molecule Could Explain the Origin of Life (3:28)
Preview thumbnail for video'Spectacular Sights of Wolfberg Arch Up-Close
Spectacular Sights of Wolfberg Arch Up-Close (1:02)
Preview thumbnail for video'Inside South Africa's Multi-Million Dollar Seafood Industry
Inside South Africa's Multi-Million Dollar Seafood Industry (1:51)
Preview thumbnail for video'How Edward the Confessor's Advisor Seized Power
How Edward the Confessor's Advisor Seized Power (2:44)
Preview thumbnail for video'Window Cleaning One of Chicago's Tallest Buildings
Window Cleaning One of Chicago's Tallest Buildings (2:32)
Preview thumbnail for video'We're All Made of Stardust. Here's How.
We're All Made of Stardust. Here's How. (3:29)
Preview thumbnail for video'Why Deception Valley's Deadly Heat is Good for Wildlife
Why Deception Valley's Deadly Heat is Good for Wildlife (1:39)
Preview thumbnail for video'Why King Harold's Rapid Coronation Sparked Outrage
Why King Harold's Rapid Coronation Sparked Outrage (2:21)
Preview thumbnail for video'You Won't Believe the Size of Botswana's Salt Flats
You Won't Believe the Size of Botswana's Salt Flats (2:43)
Preview thumbnail for video'How the Rajneesh Cult Overran This Oregon Town
How the Rajneesh Cult Overran This Oregon Town (1:28)
Preview thumbnail for video'This Science Experiment Could Help Us Live on Another Planet
This Science Experiment Could Help Us Live on Another Planet (2:57)
Preview thumbnail for video'One of the Most Dangerous Mountain Passes in the World
One of the Most Dangerous Mountain Passes in the World (1:43)
Preview thumbnail for video'The Most Beautiful View of South Africa's Tswaing Crater
The Most Beautiful View of South Africa's Tswaing Crater (2:25)
Preview thumbnail for video'Stephen Hawking's Stark Warning for Humans to Leave Earth
Stephen Hawking's Stark Warning for Humans to Leave Earth (3:05)
Preview thumbnail for video'What Created These Strange Geoglyphs in South Africa?
What Created These Strange Geoglyphs in South Africa? (1:55)
Preview thumbnail for video'How African Female Ex-Slaves Became Agooji Warriors
How African Female Ex-Slaves Became Agooji Warriors (2:35)
Preview thumbnail for video'Why Birds Flock to This South African Nature Reserve
Why Birds Flock to This South African Nature Reserve (2:25)
Preview thumbnail for video'By the Numbers: Dr. Martin Luther King Jr.
By the Numbers: Dr. Martin Luther King Jr. (1:11)