Ever wonder why the sky is blue, vs. say red, orange or purple? An effect called Rayleigh Scattering is part of the reason we ...

It might seem like a simple question. But the science behind a blue sky isn't that easy. For starters, it involves something ...

When the Sun is near the horizon, its light passes through a lot more of the atmosphere to reach the Earth's surface than ...

The exact cause remains to be determined, but scientists do know that eye color began to change long before recorded history began. The following is a transcript of the video. All blue-eyed people ...