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See video Arithmetic, Population, and Energy Part 2 of 8

Most people do not understand exponential growth, yet the concept is of fundamental importance. Lecture by Dr. Albert A. Bartlett, professor emeritus of Physics at the University of Colorado-Boulder.

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See video RMS Titanic - Original Pictures

Original black & white photos of the Titanic, which sank on 15 April 1912, resulting in the deaths of 1,517 people.

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See video Carl Sagan - Pale Blue Dot

The Pale Blue Dot is a photograph of planet Earth made by Voyager 1 from a record distance, showing it against the vastness of space.

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See video Roomba Pac-Man

An ingenious recreation of Pac-Man with Roombas - autonomous robot vacuum cleaners.

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See video The Science of Overpopulation

The world's population is growing at around 1.1% per year. By 2050 we should have around 9.3 billion people.

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See video Steve Jobs and Bill Gates Together: Part 3 of 10 537 5.87
See video The Mayan Calendar

Maya civilization is noted for its fully developed written language, art, architecture, mathematical, astronomical systems as well as its calendars. The Maya Long Count calendar ends on December 21, 2012, and this day is therefore considered by many to be significant.

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See video Pilot Whale almost drowns woman, then saves her

A pilot whale grabs a woman by the thigh and descends to a depth of 40 feet (12 meters) below the surface. Perhaps knowing that she might drown, the whale then quickly takes her back up to the surface.

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See video Big Dog - an ultra stable quadruped robot

BigDog is a dynamically stable robot using four legs for movement. This video demonstrates how it handles being kicked, balancing on slippery ice and overcoming obstacles.

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See video Doll Face

A machine with a doll face mimics images on television screen in search of a satisfactory visage.

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See video The Hubble Deep Field: The Most Important Image Ever Taken

A humbling series of images from the Hubble Space Telescope which show our place in the universe.

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See video Doodling in Math Class: Infinity Elephants

Various fascinating mathematical doodles. Step 1. Drawn any shape. Step 2. Draw the biggest circle you can within this shape. Step 3. Draw the biggest circle you can in the space left.

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