Optical illusions occur naturally in different habitats and conditions across the world. Cloud formations can sometimes make it seem like there's an ocean or a UFO in the sky. Whether it is salt flats ...

It’s an optical illusion that has vexed many a weary traveler -- except it’s technically not an illusion at all. This week, we’re exploring the science behind a mirage. * Chances are you’ve noticed ...

Roughly every 15 years, Earth passes through the plane of Saturn’s rings, causing them to nearly disappear from view — not to mention generating a variety of other interesting phenomena. The next such ...

optical illusion, were instead probably created by merging galaxies and may have been more common in the dense Universe soon after the Big Bang. “When galaxies interact or merge, they become more ...