Hidden letter and number optical illusions are fun because they look easy at first. But once the timer starts, the brain ...

An African fruit shines brighter than butterflies, without using pigment. Scientists reveal how microscopic structures create a blue glow so intense it lasts decades, and why evolution chose this ...

Do you think you have razor-sharp eyesight? Try this optical illusion and spot the hidden letter 'I' among the '1's in just ...

You don’t need a telescope or binoculars to enjoy the wolf supermoon, which will be bright, easy and safe to see with the ...

Have you noticed that some images are so weird that they shift before your eyes? These images have one or more elements in ...

Screenless health wristbands are fairly common nowadays, but apparently, they’re not out of tricks just yet. This health band ...

Think you have the eyes of a true problem solver? This visual puzzle asks you to find the hidden odd number among similar digits. It looks simple at first glance, but only careful thinkers can crack ...

Think your eyes never lie? These illusions prove otherwise. In this video, we explore mind-bending optical tricks that fool almost everyone, no matter how sharp they think they are. Each illusion ...

The fruit of Africa's marble berry (Pollia condensata) is a true living gemstone, sporting a stunning metallic blue sheen ...

Featuring a blurry image of abstract yellows, oranges, purples and blues, this optical illusion appears pretty plain. It's ...

US warns India of China's two-front power play: Calm at LAC, arms for Pakistan Quote of the day by Albert Einstein: 'The only ...

It’s the first supermoon of the year—and after January, stargazers won’t see another for many months. Here's how to see it.