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The fossilized leg bone of the terror bird went unidentified for almost 20 years.
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Terror Birds: The Terrible Reign of Giant Killer Birds - MSNTowering up to 10 feet tall with massive beaks and terrifying speed, these giant flightless birds dominated South America for millions of years.
In this week's video, we talk about infinite and finite monkeys, a massive new terror bird, frog news, and a Well-man! 7 Days of Science is moving!
Newly analysed fossil came from what could be the biggest-known member of a family of apex avian predators.
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