1
By TED-Ed
Published in 2015
Tens of millions of years ago, plate tectonics set North and South America on an unavoidable collision course that would change the face of the Earth and spell life or death for thousands of species. Juan D. Carrillo explains the massive biological repercussions of this collision, which caused one...
Grade Level   5 6 7 8 9 10 11 12
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2
By TED-Ed
Published in 2014
Atmospheric scientist Karen Kosiba studies how tornadoes form and do damage. Getting measurements near the surface of these twisters is difficult, though, and driving into them is a practice mostly reserved for the big screen. In this TEDYouth Talk, Kosiba describes how she and her team use...
Grade Level   6 7 8 9 10 11 12
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3
By TED-Ed
Published in 2013
Why do some regions experience full-time heat while others are reckoning with frigid temperatures and snow? And why are the seasons reversed in the two hemispheres? Rebecca Kaplan explains how the shape of the Earth's orbit around the Sun and the Earth's tilt on its axis affect the amount of...
Grade Level   K 1 2 3 4 5 6 7 8 9 10 11 12
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4
By TED-Ed
Published in 2014
Tornadoes are the most violent storms on Earth, with wind velocities that can exceed 200 miles per hour. How do these terrifying cyclones form? Meteorologist James Spann sheds light on the lifespan of tornadoes as they go from supercell thunderstorms to terrible twisters before eventually dissolving...
Grade Level   6 7 8 9 10 11 12
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5
By TED-Ed
Published in 2013
How can the shadow of the tiny moon eclipse the sight of the gargantuan sun? By sheer coincedence, the dsc of the sun in 400x larger than the disc of the moon, but it's 390x farther from Earth -- which means that when they align just right, the moon blocks all but the sun's glowing corona. Andy...
Grade Level   K 1 2 3 4 5 6 7 8 9 10 11 12
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6
By TED-Ed
Published in 2015
The study of clouds has always been a daydreamer’s science, aptly founded by a thoughtful young man whose favorite activity was staring out of the window at the sky. Richard Hamblyn tells the history of Luke Howard, the man who classified the clouds and forever changed humanity’s understanding...
Grade Level   K 1 2 3 4 5 6 7 8 9 10 11 12
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7
By TED-Ed
Published in 2017
In 1995, scientists pointed the Hubble Telescope at an area of the sky near the Big Dipper. The location was apparently empty, and the whole endeavor was risky -- what, if anything, was going to show up? But what came back was nothing short of spectacular: an image of over 1,500 galaxies glimmering...
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