# Why the Sky Turns Blue: The Science of Sunlight and Air Molecules On bright sunny days, we look up and see a beautiful blue sky. Many people once thought the sky’s blue color came from reflecting the ocean. This old idea is wrong. The real reason comes from sunlight and tiny molecules inside Earth’s … Read more
# Rainbows: How Sunlight Paints Colorful Arcs in the Sky A rainbow is one of the most beautiful sights in nature. When sunlight breaks into bright bands of red, orange, yellow, green, blue, indigo and violet, it forms a glowing curved arc across the sky. Many people think rainbows are physical objects, but they are … Read more
# The Magic of Northern Lights: The Science Behind Aurora Borealis Many travelers dream of seeing the northern lights. This glowing, colorful curtain of light dances across dark polar night skies. Officially named aurora borealis, it only appears near Earth’s northern magnetic pole. The southern version of this phenomenon is called aurora australis. This amazing … Read more