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.
Quakes can be triggered not just by forces deep within the earth, but also by giant dams and reservoirs, deep mines and the new technique of oil drilling called fracking.
From Burmese pythons in the Everglades, to snake-like fish in the Potomac and killer bees swarming America; a lack of predators is helping these invasive species to take control.
The development of Earth from its birth in the solar system 4 1/2 billion years ago through the cataclysmic events that created the planet we know.