Dust from African valley feeds Brazilian rainforest
Tiny dust particles from Asian deserts common over western US
Day and Night World Map
Earth's orbit creates more than a Leap Year: Also drives climate changes, ice ages
NASA spacecraft make new discoveries about northern lights
A view of Earth from Saturn
Earth-Sun Movement - Flash animation
Sound cause of eclipse shadow spectacle
Phases of the Moon
Earth's Moon is cosmic rarity
Tropic of Capricorn: What exactly is the imaginary line in the southern hemisphere?
How Rainbows are formed
Lightning strikes deadliest in summer
What determines the sky's colours at sunrise and sunset?
Tornadoes: An animated guide
Hurricanes: An animated guide
All about snow - a guide to the white stuff
Frostbite: The cold hard facts
Unprecedented view of mysterious 'nightshining clouds'
World's worst natural disasters since
How Earthquakes happen
Sahara dust storms over Canary Islands
Why is the ocean salty?
Scientists shed light on monster sea waves
For migrating sparrows, kids have a compass but adults have the map
Arctic seal swims to Spain - again!
How do marine turtles return to the same beach to lay their eggs?
Time Zone Map
Greenwich Mean Time
Climate Change Q & A
Space shuttle exhaust creates light-shining (noctilucent) clouds
What exactly is Groundhog Day? - CBC