Humans may think they know about Earth, but there's a lot about the third planet from the sun that most don't know. This series takes a look at some its aspects -- with which the average person may be unacquainted. Computer graphics and scientists reveal new facts about Earth that include rain triggered by cosmic rays, and canyons of gravity that warp space and time. ``Secrets of the Earth'' explores this world, providing data and inspiring a sense of awe that people usually feel about other spheres.
Quicksand, grabbing unsuspecting victims in a mortal grip; whirlpools, the relentless swirls of water trapping entire boats in their swift vortices; rip currents, the hidden rivers of ocean water sweeping even strong swimmers beyond the waves.
Volcanic destruction; oxidized auto plants and overgrown homes go under the microscope; seeking to uncover the secrets of earthly repossession.
Thunderstorms create gigantic red and blue electrical shapes above the clouds; ice crystals refract light into multiple suns; rainbows appear, and every observer sees a different one.
Sinkholes generate far below the surface; these invisible predator are capable of opening up across more than 20 of the earth's surface.
The secrets behind some of the asteroids, comets and space debris that have fallen to Earth; the latest technologies to detect space objects before they strike and spacecraft designed to prevent them from attacking the planet in the future.
A look at the various ways that earthquakes can be caused.
Burmese pythons in the Everglades, snake-like fish in the Potomac and killer bees swarming America
The creation of the Earth 4.5 billion years ago, and what could become of it in the future, are examined.