A series examining the characteristics of the Earth's interior, surface and atmosphere begins with a look at how raindrops are formed.
An examination of tsunamis looks at what causes them, where they happen and how they move from open sea to land.
An examination of tides includes a look at the extreme tidal range of Canada's Bay of Fundy and the tidal bores of Alaska's Turnagain Arm.
A look at volcanoes and how they affect the weather includes an examination of the eruption of Mount Tambora in Indonesia in 1815.
A examination of gravity includes a report on an anomaly in Canada's Hudson Bay and a look at how earthquakes affect Earth's gravitational field.
A look at Earth's ideal position in the solar system that enables it to sustain life.
An examination of Earth's metallic core and how it contributes to a magnetic shield that protects the planet from harmful space radiation.
A look at how snow forms and can result in dangerous blizzards examines researchers' work at Storm Peak Laboratory in Steamboat Springs, Colo.; and snowfall in Syracuse, N.Y., that develops over the Great Lakes.
A look at Earth's unusual places, including underwater ecosystems, subterranean spaces and igneous rock formations.
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.
