Secrets of the Earth

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.